Failure of the RA Reception Antenna 2

TASK 34-42-00-810-835-A
Failure of the RA Reception Antenna 2

1. Possible Causes

ANTENNA-RA RCPTN, 2 [5SA2]
XCVR-RA, 2 [2SA2]
wiring between the RA transceiver 2 (2SA2) and the RA reception antenna 2 (5SA2)

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
AMM 34-42-00-740-002	BITE Test of the Radio Altimeter
ASM 344202
AMM 34-42-11-000-001	Removal of the Radio Altimeter Antenna
AMM 34-42-11-400-001	Installation of the Radio Altimeter Antenna
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 34-42-00-740-098-A ** ON A/C NOT FOR ALL

A. Test
(1) Do the BITE test of the radio altimeter (system 2) AMM 34-42-00-740-002.

4. Fault Isolation
Subtask 34-42-00-810-088-A ** ON A/C NOT FOR ALL

A. If the test gives the maintenance message RA2 ANTENNA (5SA2):

remove the ANTENNA-RA RCPTN, 2 [5SA2] AMM 34-42-11-000-001
remove the XCVR-RA, 2 [2SA2] AMM 34-42-33-000-001
do a check of the wiring between the RA transceiver 2 (2SA2) and the RA reception antenna 2 (5SA2) ASM 344202.

(1) If there is continuity:

(2) If there is no continuity:

repair the wiring between the RA transceiver 2 (2SA2) and the RA reception antenna 2 (5SA2)>: pin AA/C of the RA transceiver 2 (2SA2) ASM 344202
install the RA transceiver 2 (2SA2) and the RA reception antenna 2 (5SA2).

(a) If the fault continues:

Subtask 34-42-00-740-099-A ** ON A/C NOT FOR ALL

B. Do the test given in Para. 3.

[Rev.8 from Aug 2018] 2026.04.04 04:33:10 UTC