AD/RAD/92 Amdt 2 Rockwell Collins TDR-94/94D Transponder/Honeywell AZ800/810 Air Data Computer Selected Altitude Data Inputs (Cth)

AIRWORTHINESS DIRECTIVE On the commencement date specified below, and for the reasons set out in the background section, the CASA delegate whose signature appears below repeals Airworthiness Directive (AD) AD/RAD/92 Amdt 1 and issues the following AD under subregulation 39.001 (1) of CASR and subsection 33 (3) of the Acts Interpretation Act 1901. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct an unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section.

Radio Communication (including Emergency Transmitters and Navigation Equipment) AD/RAD/92 Rockwell Collins TDR-94/94D Transponder/Honeywell AZ800/810 Air Data Computer Selected Altitude Data Inputs 18/2021 Amdt 2

Applicability: Rockwell Collins Mode S Transponders identified by type and Part Number (P/N) in Table 1 when installed in an aeroplane equipped with Honeywell AZ800 or AZ810 (all part numbers) air data computers (ADC) where the data bus interface between the Honeywell ADC and the Rockwell Collins transponder is providing the Selected Altitude data input to the transponder. Table 1 - Transponders identified by Type and P/N Type P/N (all serial numbers) TDR-94 622-9352-007, 622-9352-008 and 622-9352-108 TDR-94D 622-9210-007, 622-9210-008 and 622-9210-108 Note 1: These transponder/ADC combinations are known to be installed on, but not limited to, the following aeroplanes: Manufacturer Model Avions de Transport Régional (ATR) ATR 42 and ATR 72 series Bombardier (formerly Canadair) CL-600-2A12 (601 Variant), CL-600-2B16 (601-3A and 601-3R Variants) de Havilland Canada (DHC) DHC-8, Series 100, 200 and 300, all models Dassault Aviation Mystère-Falcon 900 series Gulfstream G-IV Requirement: 1. Either: a. Modify the transponder in accordance with the applicable Rockwell Collins Service Bulletin (SB) listed in Table 2 and Table 3. or b. Replace the transponder, with a TDR-94 unit identified by P/N 622-9352-309 or -409, or a TDR-94D unit identified by P/N 622-9210-309 or -409, as applicable in accordance with an approved aeroplane modification. Table 2 - TDR-94 Transponders Current P/N New P/N(options) Rockwell Collins Service Bulletin (SB) instructions to be used for modification 622-9352-007 622-9352-309 TDR-94/94D-34-506506 as in force from time to time. 622-9352-409 TDR-94/94D-34-507506 as in force from time to time. 622-9352-008 622-9352-309 TDR-94/94D-34-505506 as in force from time to time. 622-9352-409 TDR-94/94D-34-507506 as in force from time to time. 622-9352-108 622-9352-409 TDR-94/94D-34-505506 as in force from time to time. Table 3 - TDR-94D Transponders Current P/N New P/N (options) Rockwell Collins SB instructions to be used for modification 622-9210-007 622-9210-309 TDR-94/94D-34-506506 as in force from time to time. 622-9210-409 TDR-94/94D-34-507506 as in force from time to time. 622-9210-008 622-9210-309 TDR-94/94D-34-505506 as in force from time to time. 622-9210-409 TDR-94/94D-34-507506 as in force from time to time. 622-9210-108 622-9210-409 TDR-94/94D-34-505506 as in force from time to time.