Document ID: chunk:federal_register_of_legislation:F2021L01225:body:0:p1
Version: federal_register_of_legislation:F2021L01225
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Character Range: 0–8293

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