ATA 35 OXYGEN

• ED Decision 2014/004/R found in: CS-MMEL Issue 3 - Master Minimum Equipment List (May 2021)

ATA 35 OXYGEN ED Decision 2014/004/R Summary of the guidance items: <table border="1" cellpadding="0" cellspacing="0" width="608"><tr><td valign="top" width="418"><p><b>Item</b></p></td><td valign="top" width="190"><p><b>ATA</b></p></td></tr><tr><td valign="top" width="418"><p>Supplemental Oxygen System (Non- Pressurized Aircraft)</p></td><td valign="top" width="190"><p>35-00-1</p></td></tr><tr><td valign="top" width="418"><p>Flight Crew Fixed Oxygen System (Supplemental)</p></td><td valign="top" width="190"><p>35-10-1</p></td></tr><tr><td valign="top" width="418"><p>Passenger/Cabin Crew Oxygen System (Supplemental) (if installed)</p></td><td valign="top" width="190"><p>35-20-1</p></td></tr><tr><td valign="top" width="418"><p>First-Aid Oxygen</p></td><td valign="top" width="190"><p>35-50-1</p></td></tr></table> Aircraft applicability: Non-pressurised Aeroplanes and Helicopters <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="572"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="32"></td></tr><tr><td colspan="6" valign="top" width="572"></td><td valign="top" width="32"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1</p></td><td valign="top" width="135"><p>Supplemental Oxygen System </p><p>(Non- Pressurized Aircraft) </p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-1</p></td><td valign="top" width="135"><p>Flight Crew Compartment </p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-1A</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude.</p></td></tr><tr><td valign="top" width="82"><p>35-00-1-2</p></td><td valign="top" width="135"><p>Cabin Compartment</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-2A</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>Any in excess of those required may be inoperative.</p></td></tr><tr><td valign="top" width="82"><p>35-00-1-2B</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude. </p></td></tr><tr height="0"></tr></table> Additional considerations: 35-00-1-1A: Additional restrictions on air conditioning system, and/or availability of portable oxygen units, may be needed to mitigate the risk against smoke in the flight crew compartment. 35-00-1-2A: Additional restrictions on air conditioning system, and/or availability of portable oxygen units, may be needed to mitigate the risk against smoke in the cabin. Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="605"><tr><td colspan="6" valign="top" width="502"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="103"></td></tr><tr><td colspan="6" valign="top" width="502"></td><td valign="top" width="103"></td></tr><tr><td colspan="2" valign="top" width="218"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="218"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td valign="top" width="84"><p>35-10-1</p></td><td valign="top" width="134"><p>Flight Crew Fixed Oxygen System</p><p>(Supplemental)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-1</p></td><td valign="top" width="134"><p>Flight Crew Compartment Pressure Indications</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-1A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(O)(M) One or more may be inoperative provided a procedure is used to ensure that oxygen supply is above the minimum for the intended flight.</p><p>Procedures:</p><p>(O)/(M) To provide an alternate means to compute the available oxygen quantity, e.g. using the pressure gauge located on the bottle.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-2</p></td><td valign="top" width="134"><p>Bottle Gauges</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-2A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the associated flight crew compartment pressure indication is operative.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-3</p></td><td valign="top" width="134"><p>Additional Oxygen Masks <br/> (e.g. Supernumerary)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-3A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the associated seat is not occupied.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-3B</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the maximum altitude is limited to 10 000 ft pressure altitude.</p></td></tr><tr height="0"></tr></table> Additional considerations: N/A Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="510"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="93"></td></tr><tr><td colspan="6" valign="top" width="510"></td><td valign="top" width="93"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td valign="top" width="72"><p>35-20-1</p></td><td valign="top" width="146"><p>Passenger/Cabin Crew Oxygen System (Supplemental oxygen) </p><p>(if installed)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="72"><p>35-20-1A</p></td><td valign="top" width="146"></td><td valign="top" width="38"><p>B</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O)(M) May be inoperative provided: </p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Maximum altitude is limited to 10 000 ft pressure altitude,</p><p align="left">(b) An adequate supply of fresh air is provided to the cabin, and</p><p align="left">(c) Passengers are appropriately briefed.</p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) or alternatively (M) To set the aircraft in a configuration providing an adequate supply of fresh air to the cabin.</p><p>(O) To provide a passenger briefing in accordance with the dispatch configuration.</p></td></tr><tr><td valign="top" width="72"><p>35-20-1B</p></td><td valign="top" width="146"></td><td valign="top" width="38"><p>B</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O) May be inoperative provided: </p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Maximum altitude is limited to 25 000 ft pressure altitude,</p><p align="left">(b) Air conditioning packs are operative,</p><p align="left">(c) All components of the pressurisation system are operative,</p><p align="left">(d) Aeroplane is able to descend within 4 minutes to a cabin pressure altitude of 13 000 ft at all points along the route to be flown,</p><p align="left">(e) Portable oxygen units are available for all required cabin crew members,</p><p align="left">(f) Sufficient oxygen quantity is available for at least 10 % of the passengers for the entire flight time when the cabin pressure altitude is between 10 000 ft and 13 000 ft following a decompression event at the most critical point of the intended flight route, and</p><p align="left">(g) Passengers are appropriately briefed.</p></td></tr><tr><td colspan="2" valign="top" width="217"><p> (continued)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr height="0"></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="522"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="81"></td></tr><tr><td colspan="6" valign="top" width="522"></td><td valign="top" width="81"></td></tr><tr><td colspan="2" valign="top" width="218"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="218"><p>ITEM</p></td><td valign="top" width="39"></td><td colspan="4" valign="top" width="347"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="218"><p> (continued)</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) To provide passenger briefing in accordance with the dispatch configuration.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-1</p></td><td valign="top" width="133"><p>Automatic Presentation System</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"><p>35-20-1-1A</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>C</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>May be inoperative provided:</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) The manual deployment from the flight crew compartment is operative, and</p><p align="left">(b) The maximum altitude is limited to 30 000 ft pressure altitude.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-1B</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>C</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O) May be inoperative provided:</p><p align="left">(a) Maximum altitude is limited to 25 000 ft pressure altitude, and</p><p align="left">(b) Aeroplane is able to descend within 4 minutes to a cabin pressure altitude of 13 000 ft at all points along the route to be flown,</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) To ensure passenger oxygen availability and quantity is adequate to the intended route taking into account manual deployment may not be available (hidden failure) when needed.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-2</p></td><td valign="top" width="133"><p>Passenger Service Units (Drop-Down Oxygen)</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"><p>35-20-1-2A</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>B</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(M)(O) One or more passenger service units may be inoperative provided:</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Affected seats are blocked and placarded to prevent occupancy, and</p><p align="left">(b) Units are operative for all operative passenger seats, toilet compartments and cabin crew locations.</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(M) or alternatively (O) To give guidance reference for a practical mean of prohibiting the use of the affected seat(s).</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr height="0"></tr></table> Additional considerations: 35-20-1A: The fresh air is non-re-circulated air. 35-20-1B: The total amount of supplemental oxygen required in Portable Passenger Oxygen units (e) is in addition to the amount required for first-aid oxygen. The oxygen quantity requirements are based on CAT rules. The intent of the CAT rules is to ensure that 10% of passenger, wherever there are should have access to oxygen. This requirement is mainly applicable to small aircraft not certified to fly above FL250. For those small aircraft, portable oxygen units can be embarked for 10% of the passengers and circulated in the aircraft whenever needed. This is not relevant to big aircraft since it would not be realistic to embark additional portable oxygen bottles for 10% of the passengers and ensure those bottles would be circulated throughout the aircraft in the case of necessity. 35-20-1-1A Automatic Presentation System: The automatic function of the passenger oxygen system can only be tested by simulation (usually by an MRB task) if no built-in monitoring is provided. The normal system is also checked by MRB task with similar intervals by actuating the flight crew compartment manual control. The distinction between automatic and manual is made in the certification specification for design requirements as a decompression at flight altitudes of more than 30 000 ft would result in rapid loss of consciousness that justifies the automatic presentation. Failure of the automatic function is generally not detected until the maintenance task is performed and thus MMEL guidance to cover the loss of this particular function is only justified to release the aircraft after maintenance. The proposed guidance is only applicable to design where the manual control system is monitored and is indicated to the crew in case of failure by dedicated fault message before the flight. 35-20-1-1B Automatic Presentation System: This entry is to cover cases where the manual control system is not monitored and thus no credit could be taken upon its availability. The associated limitations are based on CAT.IDE.A.235 (c) rule. It is expected that the descent performance dispatch condition (b) is explicited at aircraft type MMEL level. 35-20-1-2A Rectification interval B is more restrictive than the rectification interval proposed for 25-21-1A (Passenger Seats) in order to cover the consequence of the inoperative unit on adjacent passengers and/or cabin crew. Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="575"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="29"></td></tr><tr><td colspan="6" valign="top" width="575"></td><td valign="top" width="29"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="39"></td><td colspan="4" valign="top" width="347"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="310"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="95"><p>35-50-1</p></td><td valign="top" width="123"><p>First-Aid Oxygen</p></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="95"><p>35-50-1A</p></td><td valign="top" width="123"></td><td valign="top" width="39"><p>D</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="36"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(M)(O) Any portable oxygen dispensing unit in excess of those required may be inoperative or missing provided:</p><p align="left">(a) Required distribution of operative units is maintained throughout the aircraft,</p><p align="left">(b) The inoperative portable oxygen dispensing unit is placarded inoperative, and</p><p align="left">(c) Procedures are established and used to alert crew members of inoperative or missing equipment. </p></td></tr><tr><td valign="top" width="95"></td><td valign="top" width="123"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(M) To provide instructions to placard the inoperative portable oxygen dispensing unit or its installed location if the unit is removed from its installed location. To secure the portable oxygen dispensing unit if if the unit is removed from its installed location and stored in another location.</p><p>(O) To provide procedures to alert crew members.</p></td></tr><tr height="0"></tr></table> Additional considerations: First-Aid Oxygen Supply Time: The minimum oxygen supply time should be equal to the time needed for the aircraft to land on an aerodrome. The minimum oxygen supply time depends of the amount of oxygen needed to supply 2 % of the passengers with oxygen after a decompression. Number of portable oxygen dispensing units: The number of mandatory portable oxygen dispensing units, defined for each aircraft type, is calculated as follows: — One portable oxygen dispensing unit is required for each required cabin crew, and — Portable oxygen dispensing units are required for 2 % of the passengers. The minimum number of required portable oxygen dispensing units is determined by the highest number due to the above requirements. The actual number of portable oxygen dispensing units is determined by the operator itself and depends on the flight duration, in particular the time needed to reach the nearest aerodrome for landing. Relief can be considered for partially filled bottles provided that the oxygen quantity is in accordance with the applicable regulations. In this case, a procedure should be developed to ensure that the total quantity of oxygen in the operative bottles is adequate. When determining the location for storage of the inoperative units, compliance with the dangerous goods requirements must be considered. ATA 35 OXYGEN ED Decision 2014/004/R Summary of the guidance items: <table border="1" cellpadding="0" cellspacing="0" width="608"><tr><td valign="top" width="418"><p><b>Item</b></p></td><td valign="top" width="190"><p><b>ATA</b></p></td></tr><tr><td valign="top" width="418"><p>Supplemental Oxygen System (Non- Pressurized Aircraft)</p></td><td valign="top" width="190"><p>35-00-1</p></td></tr><tr><td valign="top" width="418"><p>Flight Crew Fixed Oxygen System (Supplemental)</p></td><td valign="top" width="190"><p>35-10-1</p></td></tr><tr><td valign="top" width="418"><p>Passenger/Cabin Crew Oxygen System (Supplemental) (if installed)</p></td><td valign="top" width="190"><p>35-20-1</p></td></tr><tr><td valign="top" width="418"><p>First-Aid Oxygen</p></td><td valign="top" width="190"><p>35-50-1</p></td></tr></table> Aircraft applicability: Non-pressurised Aeroplanes and Helicopters <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="572"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="32"></td></tr><tr><td colspan="6" valign="top" width="572"></td><td valign="top" width="32"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1</p></td><td valign="top" width="135"><p>Supplemental Oxygen System </p><p>(Non- Pressurized Aircraft) </p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-1</p></td><td valign="top" width="135"><p>Flight Crew Compartment </p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-1A</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude.</p></td></tr><tr><td valign="top" width="82"><p>35-00-1-2</p></td><td valign="top" width="135"><p>Cabin Compartment</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="82"><p>35-00-1-2A</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>Any in excess of those required may be inoperative.</p></td></tr><tr><td valign="top" width="82"><p>35-00-1-2B</p></td><td valign="top" width="135"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude. </p></td></tr><tr height="0"></tr></table> Additional considerations: 35-00-1-1A: Additional restrictions on air conditioning system, and/or availability of portable oxygen units, may be needed to mitigate the risk against smoke in the flight crew compartment. 35-00-1-2A: Additional restrictions on air conditioning system, and/or availability of portable oxygen units, may be needed to mitigate the risk against smoke in the cabin. Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="605"><tr><td colspan="6" valign="top" width="502"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="103"></td></tr><tr><td colspan="6" valign="top" width="502"></td><td valign="top" width="103"></td></tr><tr><td colspan="2" valign="top" width="218"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="218"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td valign="top" width="84"><p>35-10-1</p></td><td valign="top" width="134"><p>Flight Crew Fixed Oxygen System</p><p>(Supplemental)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-1</p></td><td valign="top" width="134"><p>Flight Crew Compartment Pressure Indications</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-1A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(O)(M) One or more may be inoperative provided a procedure is used to ensure that oxygen supply is above the minimum for the intended flight.</p><p>Procedures:</p><p>(O)/(M) To provide an alternate means to compute the available oxygen quantity, e.g. using the pressure gauge located on the bottle.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-2</p></td><td valign="top" width="134"><p>Bottle Gauges</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-2A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the associated flight crew compartment pressure indication is operative.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-3</p></td><td valign="top" width="134"><p>Additional Oxygen Masks <br/> (e.g. Supernumerary)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="84"><p>35-10-1-3A</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the associated seat is not occupied.</p></td></tr><tr><td valign="top" width="84"><p>35-10-1-3B</p></td><td valign="top" width="134"></td><td valign="top" width="38"><p>C</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>One or more may be inoperative provided the maximum altitude is limited to 10 000 ft pressure altitude.</p></td></tr><tr height="0"></tr></table> Additional considerations: N/A Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="510"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="93"></td></tr><tr><td colspan="6" valign="top" width="510"></td><td valign="top" width="93"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="38"></td><td colspan="4" valign="top" width="348"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td valign="top" width="72"><p>35-20-1</p></td><td valign="top" width="146"><p>Passenger/Cabin Crew Oxygen System (Supplemental oxygen) </p><p>(if installed)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="72"><p>35-20-1A</p></td><td valign="top" width="146"></td><td valign="top" width="38"><p>B</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O)(M) May be inoperative provided: </p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Maximum altitude is limited to 10 000 ft pressure altitude,</p><p align="left">(b) An adequate supply of fresh air is provided to the cabin, and</p><p align="left">(c) Passengers are appropriately briefed.</p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) or alternatively (M) To set the aircraft in a configuration providing an adequate supply of fresh air to the cabin.</p><p>(O) To provide a passenger briefing in accordance with the dispatch configuration.</p></td></tr><tr><td valign="top" width="72"><p>35-20-1B</p></td><td valign="top" width="146"></td><td valign="top" width="38"><p>B</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O) May be inoperative provided: </p></td></tr><tr><td valign="top" width="72"></td><td valign="top" width="146"></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Maximum altitude is limited to 25 000 ft pressure altitude,</p><p align="left">(b) Air conditioning packs are operative,</p><p align="left">(c) All components of the pressurisation system are operative,</p><p align="left">(d) Aeroplane is able to descend within 4 minutes to a cabin pressure altitude of 13 000 ft at all points along the route to be flown,</p><p align="left">(e) Portable oxygen units are available for all required cabin crew members,</p><p align="left">(f) Sufficient oxygen quantity is available for at least 10 % of the passengers for the entire flight time when the cabin pressure altitude is between 10 000 ft and 13 000 ft following a decompression event at the most critical point of the intended flight route, and</p><p align="left">(g) Passengers are appropriately briefed.</p></td></tr><tr><td colspan="2" valign="top" width="217"><p> (continued)</p></td><td valign="top" width="38"></td><td valign="top" width="37"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr height="0"></tr></table> <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="522"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="81"></td></tr><tr><td colspan="6" valign="top" width="522"></td><td valign="top" width="81"></td></tr><tr><td colspan="2" valign="top" width="218"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="218"><p>ITEM</p></td><td valign="top" width="39"></td><td colspan="4" valign="top" width="347"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td colspan="3" valign="top" width="311"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="218"><p> (continued)</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) To provide passenger briefing in accordance with the dispatch configuration.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-1</p></td><td valign="top" width="133"><p>Automatic Presentation System</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"><p>35-20-1-1A</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>C</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>May be inoperative provided:</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) The manual deployment from the flight crew compartment is operative, and</p><p align="left">(b) The maximum altitude is limited to 30 000 ft pressure altitude.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-1B</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>C</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>0</p></td><td colspan="2" valign="top" width="273"><p>(O) May be inoperative provided:</p><p align="left">(a) Maximum altitude is limited to 25 000 ft pressure altitude, and</p><p align="left">(b) Aeroplane is able to descend within 4 minutes to a cabin pressure altitude of 13 000 ft at all points along the route to be flown,</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(O) To ensure passenger oxygen availability and quantity is adequate to the intended route taking into account manual deployment may not be available (hidden failure) when needed.</p></td></tr><tr><td valign="top" width="85"><p>35-20-1-2</p></td><td valign="top" width="133"><p>Passenger Service Units (Drop-Down Oxygen)</p></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="85"><p>35-20-1-2A</p></td><td valign="top" width="133"></td><td valign="top" width="39"><p>B</p></td><td valign="top" width="36"><p>-</p></td><td valign="top" width="37"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(M)(O) One or more passenger service units may be inoperative provided:</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p align="left">(a) Affected seats are blocked and placarded to prevent occupancy, and</p><p align="left">(b) Units are operative for all operative passenger seats, toilet compartments and cabin crew locations.</p></td></tr><tr><td valign="top" width="85"></td><td valign="top" width="133"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(M) or alternatively (O) To give guidance reference for a practical mean of prohibiting the use of the affected seat(s).</p></td></tr><tr><td colspan="2" valign="top" width="218"></td><td valign="top" width="39"></td><td valign="top" width="36"></td><td valign="top" width="37"></td><td colspan="2" valign="top" width="273"></td></tr><tr height="0"></tr></table> Additional considerations: 35-20-1A: The fresh air is non-re-circulated air. 35-20-1B: The total amount of supplemental oxygen required in Portable Passenger Oxygen units (e) is in addition to the amount required for first-aid oxygen. The oxygen quantity requirements are based on CAT rules. The intent of the CAT rules is to ensure that 10% of passenger, wherever there are should have access to oxygen. This requirement is mainly applicable to small aircraft not certified to fly above FL250. For those small aircraft, portable oxygen units can be embarked for 10% of the passengers and circulated in the aircraft whenever needed. This is not relevant to big aircraft since it would not be realistic to embark additional portable oxygen bottles for 10% of the passengers and ensure those bottles would be circulated throughout the aircraft in the case of necessity. 35-20-1-1A Automatic Presentation System: The automatic function of the passenger oxygen system can only be tested by simulation (usually by an MRB task) if no built-in monitoring is provided. The normal system is also checked by MRB task with similar intervals by actuating the flight crew compartment manual control. The distinction between automatic and manual is made in the certification specification for design requirements as a decompression at flight altitudes of more than 30 000 ft would result in rapid loss of consciousness that justifies the automatic presentation. Failure of the automatic function is generally not detected until the maintenance task is performed and thus MMEL guidance to cover the loss of this particular function is only justified to release the aircraft after maintenance. The proposed guidance is only applicable to design where the manual control system is monitored and is indicated to the crew in case of failure by dedicated fault message before the flight. 35-20-1-1B Automatic Presentation System: This entry is to cover cases where the manual control system is not monitored and thus no credit could be taken upon its availability. The associated limitations are based on CAT.IDE.A.235 (c) rule. It is expected that the descent performance dispatch condition (b) is explicited at aircraft type MMEL level. 35-20-1-2A Rectification interval B is more restrictive than the rectification interval proposed for 25-21-1A (Passenger Seats) in order to cover the consequence of the inoperative unit on adjacent passengers and/or cabin crew. Aircraft applicability: Aeroplanes <table border="1" cellpadding="0" cellspacing="0" width="604"><tr><td colspan="6" valign="top" width="575"><p>ATA Chapter: 35 Oxygen</p></td><td valign="top" width="29"></td></tr><tr><td colspan="6" valign="top" width="575"></td><td valign="top" width="29"></td></tr><tr><td colspan="2" valign="top" width="217"><p>(1) System &amp; Sequence Numbers</p></td><td colspan="5" valign="top" width="386"><p>(2) Rectification Interval</p></td></tr><tr><td colspan="2" valign="top" width="217"><p>ITEM</p></td><td valign="top" width="39"></td><td colspan="4" valign="top" width="347"><p>(3) Number installed</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td colspan="3" valign="top" width="310"><p>(4) Number required for dispatch</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"><p>(5) Remarks or Exceptions</p></td></tr><tr><td colspan="2" valign="top" width="217"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="95"><p>35-50-1</p></td><td valign="top" width="123"><p>First-Aid Oxygen</p></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"></td></tr><tr><td valign="top" width="95"><p>35-50-1A</p></td><td valign="top" width="123"></td><td valign="top" width="39"><p>D</p></td><td valign="top" width="37"><p>-</p></td><td valign="top" width="36"><p>-</p></td><td colspan="2" valign="top" width="273"><p>(M)(O) Any portable oxygen dispensing unit in excess of those required may be inoperative or missing provided:</p><p align="left">(a) Required distribution of operative units is maintained throughout the aircraft,</p><p align="left">(b) The inoperative portable oxygen dispensing unit is placarded inoperative, and</p><p align="left">(c) Procedures are established and used to alert crew members of inoperative or missing equipment. </p></td></tr><tr><td valign="top" width="95"></td><td valign="top" width="123"></td><td valign="top" width="39"></td><td valign="top" width="37"></td><td valign="top" width="36"></td><td colspan="2" valign="top" width="273"><p>Procedures:</p><p>(M) To provide instructions to placard the inoperative portable oxygen dispensing unit or its installed location if the unit is removed from its installed location. To secure the portable oxygen dispensing unit if if the unit is removed from its installed location and stored in another location.</p><p>(O) To provide procedures to alert crew members.</p></td></tr><tr height="0"></tr></table> Additional considerations: First-Aid Oxygen Supply Time: The minimum oxygen supply time should be equal to the time needed for the aircraft to land on an aerodrome. The minimum oxygen supply time depends of the amount of oxygen needed to supply 2 % of the passengers with oxygen after a decompression. Number of portable oxygen dispensing units: The number of mandatory portable oxygen dispensing units, defined for each aircraft type, is calculated as follows: — One portable oxygen dispensing unit is required for each required cabin crew, and — Portable oxygen dispensing units are required for 2 % of the passengers. The minimum number of required portable oxygen dispensing units is determined by the highest number due to the above requirements. The actual number of portable oxygen dispensing units is determined by the operator itself and depends on the flight duration, in particular the time needed to reach the nearest aerodrome for landing. Relief can be considered for partially filled bottles provided that the oxygen quantity is in accordance with the applicable regulations. In this case, a procedure should be developed to ensure that the total quantity of oxygen in the operative bottles is adequate. When determining the location for storage of the inoperative units, compliance with the dangerous goods requirements must be considered.