ATA Chapter: 35 Oxygen

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

35-00-1

Supplemental Oxygen System

(Non- Pressurized Aircraft)

35-00-1-1

Flight Crew Compartment

35-00-1-1A

C

-

0

One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude.

35-00-1-2

Cabin Compartment

35-00-1-2A

C

-

-

Any in excess of those required may be inoperative.

35-00-1-2B

C

-

-

One or more may be inoperative provided the aircraft is not operated above 10 000 ft pressure altitude.

ATA Chapter: 35 Oxygen

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

35-10-1

Flight Crew Fixed Oxygen System

(Supplemental)

35-10-1-1

Flight Crew Compartment Pressure Indications

35-10-1-1A

C

-

-

(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.

Procedures:

(O)/(M) To provide an alternate means to compute the available oxygen quantity, e.g. using the pressure gauge located on the bottle.

35-10-1-2

Bottle Gauges

35-10-1-2A

C

-

0

One or more may be inoperative provided the associated flight crew compartment pressure indication is operative.

35-10-1-3

Additional Oxygen Masks
(e.g. Supernumerary)

35-10-1-3A

C

-

0

One or more may be inoperative provided the associated seat is not occupied.

35-10-1-3B

C

-

0

One or more may be inoperative provided the maximum altitude is limited to 10 000 ft pressure altitude.

ATA Chapter: 35 Oxygen

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

35-20-1

Passenger/Cabin Crew Oxygen System (Supplemental oxygen)

(if installed)

35-20-1A

B

-

0

(O)(M) May be inoperative provided:

(a) Maximum altitude is limited to 10 000 ft pressure altitude,

(b) An adequate supply of fresh air is provided to the cabin, and

(c)  Passengers are appropriately briefed.

Procedures:

(O) or alternatively (M) To set the aircraft in a configuration providing an adequate supply of fresh air to the cabin.

(O) To provide a passenger briefing in accordance with the dispatch configuration.

35-20-1B

B

-

0

(O) May be inoperative provided:

(a)   Maximum altitude is limited to 25 000 ft pressure altitude,

(b)   Air conditioning packs are operative,

(c)   All components of the pressurisation system are operative,

(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,

(e) Portable oxygen units are available for all required cabin crew members,

(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

(g) Passengers are appropriately briefed.

              (continued)

ATA Chapter: 35 Oxygen

(1)         System & Sequence Numbers

(2)         Rectification Interval

ITEM

(3)         Number installed

(4)         Number required for dispatch

(5)         Remarks or Exceptions

              (continued)

Procedures:

(O) To provide passenger briefing in accordance with the dispatch configuration.

35-20-1-1

Automatic Presentation System

35-20-1-1A

C

-

0

May be inoperative provided:

(a) The manual deployment from the flight crew compartment is operative, and

(b) The maximum altitude is limited to 30 000 ft pressure altitude.

35-20-1-1B

C

-

0

(O) May be inoperative provided:

(a) Maximum altitude is limited to 25 000 ft pressure altitude, and

(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,

Procedures:

(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.

35-20-1-2

Passenger Service Units (Drop-Down Oxygen)

35-20-1-2A

B

-

-

(M)(O) One or more passenger service units may be inoperative provided:

(a) Affected seats are blocked and placarded to prevent occupancy, and

(b) Units are operative for all operative passenger seats, toilet compartments and cabin crew locations.

Procedures:

(M) or alternatively (O) To give guidance reference for a practical mean of prohibiting the use of the affected seat(s).

ATA Chapter: 35 Oxygen

(1)     System & Sequence Numbers

(2)     Rectification Interval

ITEM

(3)     Number installed

(4)     Number required for dispatch

(5)     Remarks or Exceptions

35-50-1

First-Aid Oxygen

35-50-1A

D

-

-

(M)(O) Any portable oxygen dispensing unit in excess of those required may be inoperative or missing provided:

(a) Required distribution of operative units is maintained throughout the aircraft,

(b) The inoperative portable oxygen dispensing unit is placarded inoperative, and

(c)  Procedures are established and used to alert crew members of inoperative or missing equipment.

Procedures:

(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.

(O) To provide procedures to alert crew members.