ETSO Deviation

Use of a bi-directional data bus instead of two independent data buses one for data request and the other for data delivery. Exclude the Disk Drive Unit and the embedded Disk Controller from the 100% screening requirement.

Use Rev. A of SAE AS 8002 respectively of SAE AS 8034

Deviate from ETSO-C3d 3.1.1 and use SAE AS 8004 Rev. A instead of AS 8004 as the minimum requirement standard.

Deviate from §2.2.2.1 “Preamplifier Gain and Noise Figure” of RTCA/DO-228, and allow a lower gain by the preamplifier for specific installations.

use RTCA DO-229C instead of RTCA DO-229A and use some tests of the draft of RTCA DO-229D

Different display and activation implementation and newer interference levels

Deviate from § 3.10.1 by reducing the ultimate static loads to be withstood by this specific Unit Load Device (ULD) for specific applications.

Changed marking on displays for Aircraft Altimeter, Pressure Actuated, Sensitive Type and Manifold Pressure Instruments, different environmental standards for Maximum Allowable Airspeed Indicator Systems, and different frequencies for 406MHz ELT

relaxation of interference requirements for a specific condition

applicable to Environmental Testing in general and to Mode S Transponders

use of later industry and environmental standards, applicability of tests, different definitions for crosstalk