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AMC1 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents

Available versions for ERULES-1963177438-19299

ED Decision 2021/008/R found in: GM Remote Aerodrome Air Traffic Services (ED 2019/004/R) Issue 2 (Jul 2020)

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AMC1 ACNS.E.LAD.310 Environmental and crash conditions encountered during accidents

ED Decision 2021/008/R

ACCEPTABLE MEANS OF COMPLIANCE APPLICABLE TO ALL SOLUTIONS

(a) The system should meet the certification specifications for the transmission of activation signals, while the equipment needed for that function is subject to the environmental test conditions of Tables 1 and 2 of this AMC, except for ELTs that are approved in accordance with European Technical Standard Order (ETSO)-C126c.

(b) If activation signals need to be transmitted by non-deployable equipment after reaching the point of end of flight to meet [CS ACNS.E.LAD.410](#_DxCrossRefBm573002941), that equipment (including antennas) should be demonstrated to pass the following tests:

(1) the impact shock test of EUROCAE ED-112A, Section 2-4.2.1;

(2) the penetration resistance test of EUROCAE ED-112A, Section 2-4.2.3;

(3) the static crush test of EUROCAE ED-112A, Section 2-4.2.4; and

(4) the high-temperature fire test of EUROCAE ED-112A, Section 2-4.2.5, except that the duration of the high-temperature fire test does not need to be longer than the time that is sufficient for transmitting the activation signals and complying with [CS ACNS.E.LAD.410](#_DxCrossRefBm573002941). Successful transmission of activation signals should be demonstrated at the end of this sequence of tests.

(c) If activation signals need to be transmitted by non-deployable equipment after reaching the point of end of flight to meet [CS ACNS.E.LAD.420](#_DxCrossRefBm573002940), that equipment (including antennas) should successfully transmit the activation signals after being subjected to the environmental tests applicable to an ELT(AF) in Tables 4-1 and 4-2 of EUROCAE ED-62B (including Change 1). However, if the duration of the flame test of EUROCAE ED-62B, Section 4.5.13 is not sufficient to ensure that at least a complete data set, such as that specified in [CS ACNS.E.LAD.140](#_DxCrossRefBm573002902), is received and that [CS ACNS.E.LAD.420](#_DxCrossRefBm573002940) is met, an appropriate duration should be determined and used for the flame test.

(d) If activation signals need to be transmitted by deployable equipment after reaching the point of end of flight to meet [CS ACNS.E.LAD.140](#_DxCrossRefBm573002902), that equipment should meet the same environmental standard as specified for an ADFR in European Technical Standard Order (ETSO)‑2C517, and should be installed as specified for an ADFR in CS 25.1457 of the Certification Specifications for Large Aeroplanes (CS-25), except that the recording of data to facilitate accident investigations is not necessary for compliance with [CS ACNS.E.LAD.310](#_DxCrossRefBm573002938).

(e) The homing-signal transmitter and antennas that are used by the system for transmitting the homing signal should successfully transmit the 121.5-MHz homing signal when subjected to the environmental tests applicable to an ELT(AF) in Tables 4-1 and Table 4-2 of EUROCAE ED-62B (including Change 1).

(f) If ELTs are used to meet [CS ACNS.E.LAD.310](#_DxCrossRefBm573002938), they should be installed in accordance with EUROCAE ED-62B (including Change 1), Chapter 6.

Table 1 — Minimum environmental qualification level test conditions applicable to the system

<table border="1" cellpadding="0" cellspacing="0" width="591"><tr><td colspan="4" valign="top" width="591">The following tests may be performed in any order or combination. Unless otherwise specified, compliance with requirements on the transmission of activation signals (<a href="#_DxCrossRefBm573002892">CS ACNS.E.LAD.110</a> and <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a>) as well as compliance with requirements on the information of activation signals (<a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a>) should be ensured for each test. In addition, the test should be considered failed if undesirable activation occurs during the test.Equipment that is used by the system may be replaced between tests. Unless otherwise specified, dedicated power sources may be replaced if the duration of the test is greater than the duration of the battery capacity.The test categories indicated in this Table are those defined in EUROCAE ED-14G. The column ‘Test categories’ contains a mention of ‘(MINIMUM)’ because more stringent test categories may be required to demonstrate that the system performs as intended under specific environmental conditions applicable to an aircraft type. When no test category is indicated in this Table, select an appropriate test category for the system.If the system includes deployable equipment, ‘The system should be activated’ in column ‘ADDITIONAL TEST CONDITIONS’ means that the system should be activated without deploying that equipment, and that the performance of the automatic deployment does not need to be checked (‘System performance should be checked’ does not include checking the performance of the deployment mechanism).Note: the environmental conditions and test procedures that are described in EUROCAE ED-14G and in RTCA DO-160G are identical so that RTCA DO-160G may be used instead of EUROCAE ED-14G.</td></tr><tr><td colspan="3" valign="top" width="340">TESTS ACCORDING TO EUROCAE ED-14G</td><td rowspan="2" valign="top" width="251">ADDITIONAL TEST CONDITIONS</td></tr><tr><td valign="top" width="113">CONDITIONS</td><td valign="top" width="113">SECTION INED-14G</td><td valign="top" width="113">TESTCATEGORIES(MINIMUM)</td></tr><tr><td valign="top" width="113">Temperature and altitudeLow temperatureHigh temperatureAltitude</td><td valign="top" width="113">4.04.5.14.5.2 &amp; 4.5.34.6.1</td><td valign="top" width="113">A1</td><td valign="top" width="251">The system should be activated before the test; compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be ensured during the test.If the projected duration of the test is greater than the duration of the dedicated power source, system activation can be delayed until the temperature is stabilised at the operating temperature.</td></tr><tr><td valign="top" width="113">DecompressionOverpressure</td><td valign="top" width="113">4.6.24.6.3</td><td valign="top" width="113">A1</td><td valign="top" width="251">The decompression test should be performed at a pressure altitude of 50 000 ft. The system performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Temperature variation</td><td valign="top" width="113">5.0</td><td valign="top" width="113">B</td><td valign="top" width="251">The system should be activated before the test; <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be met during the test.</td></tr><tr><td valign="top" width="113">Humidity</td><td valign="top" width="113">6.0</td><td valign="top" width="113">B</td><td valign="top" width="251">System performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Operational shock &amp; crash safety</td><td valign="top" width="113">7.0</td><td valign="top" width="113"></td><td valign="top" width="251">System performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Vibration</td><td valign="top" width="113">8.0</td><td valign="top" width="113">R and H</td><td valign="top" width="251">The system should be activated before the test; compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be ensured during the test.</td></tr><tr><td valign="top" width="113">Waterproofness</td><td valign="top" width="113">10.0</td><td valign="top" width="113">W</td><td valign="top" width="251">The system performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Magnetic effect</td><td valign="top" width="113">15.0</td><td valign="top" width="113">B</td><td valign="top" width="251">The system should be activated before the test.</td></tr><tr><td valign="top" width="113">Power input</td><td valign="top" width="113">16.0</td><td valign="top" width="113"></td><td valign="top" width="251">The system should be activated before the test; compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be ensured during the test in both normal and abnormal operating conditions.</td></tr><tr><td valign="top" width="113">Voltage spike</td><td valign="top" width="113">17.0</td><td valign="top" width="113"></td><td valign="top" width="251">The system should be activated before the test; compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should not be affected by the test conditions.</td></tr><tr><td valign="top" width="113">Audio frequency susceptibility</td><td valign="top" width="113">18.0</td><td valign="top" width="113"></td><td valign="top" width="251">System performance should be checked during the test.</td></tr><tr><td valign="top" width="113">Induced signal susceptibility</td><td valign="top" width="113">19.0</td><td valign="top" width="113"></td><td valign="top" width="251">System performance should be checked during the test.</td></tr><tr><td valign="top" width="113">Radio frequency susceptibility</td><td valign="top" width="113">20.0</td><td valign="top" width="113">TR</td><td valign="top" width="251">System performance should be checked during the test.</td></tr><tr><td valign="top" width="113">Radio frequency transmission</td><td valign="top" width="113">21.0</td><td valign="top" width="113">H</td><td valign="top" width="251"></td></tr><tr><td valign="top" width="113">Lightning-induced transient susceptibility</td><td valign="top" width="113">22.0</td><td valign="top" width="113"></td><td valign="top" width="251">System performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Lightning direct effects</td><td valign="top" width="113">23.0</td><td valign="top" width="113"></td><td valign="top" width="251">The test is applicable to external antennas only.The antenna should still be operative after the test.</td></tr><tr><td valign="top" width="113">Icing</td><td valign="top" width="113">24.0</td><td valign="top" width="113"></td><td valign="top" width="251">The test is applicable to external antennas and equipment.Compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be ensured during the test.</td></tr><tr><td valign="top" width="113">Electrostatic discharge</td><td valign="top" width="113">25.0</td><td valign="top" width="113">A</td><td valign="top" width="251">System performance should be checked after the test.</td></tr><tr><td valign="top" width="113">Flammability</td><td valign="top" width="113">26.0</td><td valign="top" width="113">C</td><td valign="top" width="251"></td></tr></table>

Table 2 — Flame test

<table border="1" cellpadding="0" cellspacing="0" width="593"><tr><td valign="top" width="80">CONDITIONS</td><td valign="top" width="513">TEST CONDITIONS</td></tr><tr><td valign="top" width="80">Flame</td><td valign="top" width="513">The flame test should be performed for the following components: transmitter of activation signals, antennas used by the system, and antenna cabling.At the start of the flame test, the temperature of these components should be stabilised at an ambient room temperature.The fire source should be in a tray of 1 m2 and 100 mm deep, containing water with a depth of 50 mm, in which 10 l of Avgas 100 LL is floating.The Avgas should be ignited and allowed to burn for 15 (± 2) seconds, before performing the following flame test:(a) place the components in a position directly over the centre of the fire tray at a height of 1 m (± 25 mm) above the tray; and(b) let the components remain in the flame for a duration corresponding to the time frame defined in <a href="#_DxCrossRefBm573002892">CS ACNS.E.LAD.110</a>.The flame test should be conducted in conditions as near as practicable to still air conditions. After removal from the flame, the components of the test should be allowed to cool naturally to ambient temperature before being tested.Compliance with <a href="#_DxCrossRefBm573002898">CS ACNS.E.LAD.120</a> and <a href="#_DxCrossRefBm573002902">CS ACNS.E.LAD.140</a> should be ensured after the test.</td></tr></table>

[Issue: CS-ACNS/3]