ETSO

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Product Certification Consultations

Deviates from RTCA DO-227 by permitting, for articles of LiFeS2 chemistry, a 5% change in Open Circuit Voltage during the temperature tests, if it remains less than 5% for the complete sequence and if it is shown to meet the 2% limit within 45 days
Deviates from ETSO-C142a by using RTCA DO-227A with a corrected testing pattern for battery humidity test instead of DO-227 modified by Appendix 1 of ETSO-C142a
Deviates from ETSO-C142a by using RTCA DO-227A, corrected to permit the use of an appropriate limiting voltage for the Cell Discharge Current Test, instead of DO-227 modified by Appendix 1 of ETSO-C142a
Deviate from EUROCAE/ED-62a paragraph 4.5.7.3 to make EUROCAE/ED-62a 4.5.7.3 (f) not applicable to ELT(S).
Deviates from EUROCAE ED-62A §5.3.3. by not applying this test to ELT (S)
Deviates from RTCA DO-214A section 2.8.2.9 a. by using a 3 nF capacitor instead of 0.01 pF, inserted between channel input and output for stability tests.
Deviates from RTCA DO-214A section 2.6.2.1 a. and b. by using a Sound Pressure Level of 104 dB SPL if the microphone is linear and if the frequency responses curves in standard conditions are identical at both 104dB SPL and 94dB SPL levels.
Deviates from ETSO-C142a by using revision A of RTCA DO-227
Deviates from RTCA DO-301 by permitting higher input noise temperatures for antennas specified in section 2.3 when a higher gain of the passive radiating element maintains compliance to the gain-to-noise ratio (G/T) specified in section 2.2.5. ​

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