Loss of the Altitude Bus 2 of the RA Transceiver 2 Identified by the ECAM 1

TASK 34-42-00-810-818-A
Loss of the Altitude Bus 2 of the RA Transceiver 2 Identified by the ECAM 1

1. Possible Causes

XCVR-RA, 2 [2SA2]
wiring of the ALTITUDE BUS 2 from the RA transceiver 2 (2SA2) to the first terminal block

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 31-50-00-710-001	Ground Scanning of the Central Warning System
ASM 344202
AMM 34-42-33-000-001	Removal of the Radio Altimeter Transceiver
AMM 34-42-33-400-001	Installation of the Radio Altimeter Transceiver

3. Fault Confirmation
Subtask 34-42-00-865-067-A

A. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
121VU	COM NAV/RAD ALTM/2	1SA2	K12

Subtask 34-42-00-710-058-A

B. Test
(1) Do the operational test of the central warning systems AMM 31-50-00-710-001.

4. Fault Isolation
Subtask 34-42-00-810-069-A

A. If the test gives the maintenance message FWC1 : NO DATA FROM RA2:

(1) If the fault continues:

do a check and repair the wiring of the ALTITUDE BUS 2 from the RA transceiver 2 (2SA2) to the first terminal block ASM 344202.

Subtask 34-42-00-710-059-A

B. Do the test given in Para. 3.B.

[Rev.8 from Aug 2018] 2026.04.04 04:33:09 UTC