Removal of the ATC/Mode S Transponder

TASK 34-52-33-000-001-A
Removal of the ATC/Mode S Transponder

ZONE: 127
ZONE: 128
FIN: 1SH1
FIN: 1SH2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	CAP - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
127	REAR AVIONIC COMPARTMENT
128	REAR AVIONIC COMPARTMENT
824

C. Referenced Information

REFERENCE	DESIGNATION
ATC/Mode S Transponder ** ON A/C NOT FOR ALL
ATC/Mode S Transponder ** ON A/C NOT FOR ALL

3. Job Set-up
Subtask 34-52-33-865-050-A

A. Open, safety and tag this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
FOR FIN: 1SH1 (XPDRATC/MODE S, 1)
49VU	COM NAV/ATC/1	5SH1	G11
** ON A/C NOT FOR ALL
FOR FIN: 1SH2 (XPDRATC/MODE S, 2)
121VU	COM NAV/ATC/2	5SH2	K07

Subtask 34-52-33-010-050-A

B. Get Access
(1) Put the ACCESS PLATFORM 1M(3 FT) in position at the access door 824 in zone 128.
(2) Open the access door 824.

4. Procedure
Subtask 34-52-33-020-050-A

A. Removal of the ATC/Mode S Transponder
(1) Loosen the nuts (4).
(2) Lower the nuts (4).
(3) Pull the ATC/Mode S transponder, on its rack (3) to disconnect the electrical connectors (2).
(4) Remove the ATC/Mode S transponder (1) from its rack (3).
(5) Put CAP - BLANKING on the disconnected electrical connectors (2).

[Rev.10 from 2021] 2026.04.02 06:23:32 UTC