_______________
**ON A/C 001-004,
Post SB 34-1171 For A/C 001-004,
A. If the test gives the maintenance message RA1 ANTENNA (5SA1):
- remove the ANTENNA-RA RCPTN, 1 (5SA1) (Ref. AMM TASK 34-42-11-000-001)
- remove the XCVR-RA, 1 (2SA1) (Ref. AMM TASK 34-42-33-000-001)
- do a check of the wiring between the RA transceiver 1 (2SA1) and the RA reception antenna 1 (5SA1) (Ref. ASM 34-42/01).
(1) If there is continuity:
- install a new RA reception antenna 1(5SA1) (Ref. AMM TASK 34-42-11-400-001)
- install the RA tranceiver 1 (2SA1) (Ref. AMM TASK 34-42-33-400-001).
(2) If there is no continuity:
- repair the wiring between the RA transceiver 1 (2SA1) and the RA reception antenna 1 (5SA1): pin AA/C of the RA transceiver 1 (2SA1) (Ref. ASM 34-42/01).
- install the RA transceiver 1 (2SA1) and the RA reception antenna 1 (5SA1).
(a) If the fault continues:
- replace the XCVR-RA, 1 (2SA1) (Ref. AMM TASK 34-42-33-000-001) (Ref. AMM TASK 34-42-33-400-001).
B. Do the test given in para. 3.
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1 EFF : 001-004, ∞∞34-42-00∞∞∞∞∞∞∞∞∞∞Page 257
Feb 01/05R
CES TASK 34-42-00-810-834
Failure of the RA Transmission Antenna 1
1. Possible Causes_______________
- ANTENNA-RA XMSN, 1 (6SA1)
- XCVR-RA, 1 (2SA1)
- wiring between the RA transceiver 1 (2SA1) and the RA transmission antenna 1 (6SA1)
2. Job Set-up Information______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 34-42-00-740-002 BITE Test of the Radio Altimeter
AMM 34-42-11-000-001 Removal of the Radio Altimeter Antennas 5SA1, 5SA2, 6SA1, 6SA2
AMM 34-42-11-400-001 Installation of the Radio Altimeter Antennas 5SA1, 5SA2, 6SA1, 6SA2
AMM 34-42-33-000-001 Removal of the Radio Altimeter Transceiver 2SA1 and 2SA2
AMM 34-42-33-400-001 Installation of the Radio Altimeter Transceiver 2SA1 and 2SA2
ASM 34-42/01
3. Fault Confirmation__________________
**ON A/C 001-004,
Post SB 34-1171 For A/C 001-004,
A. Test
(1) Do the BITE test of the radio altimeter (system 1) (Ref. AMM TASK 34-42-00-740-002).
4. Fault Isolation
_______________
**ON A/C 001-004,
Post SB 34-1171 For A/C 001-004,
A. If the test gives the maintenance message RA1 ANTENNA (6SA1):
- remove the ANTENNA-RA XMSN, 1 (6SA1) (Ref. AMM TASK 34-42-11-000-001)
- remove the XCVR-RA, 1 (2SA1) (Ref. AMM TASK 34-42-33-000-001)
- do a check of the wiring between the RA transceiver 1 (2SA1) and the RA transmission antenna 1 (6SA1) (Ref. ASM 34-42/01).
(1) If there is continuity:
- install a new RA transmission antenna 1 (6SA1) (Ref. AMM TASK 34-42-11-400-001)
- install the RA transceiver 1 (2SA1) (Ref. AMM TASK 34-42-33-400-001).
(2) If there is no continuity:
- repair the wiring between the RA transceiver 1 (2SA1) and the RA transmission antenna 1 (6SA1): pin AB/C of the RA transceiver 1 (2SA1) (Ref. ASM 34-42/01).
- install the RA transceiver 1 (2SA1) and the RA transmission antenna 1 (6SA1).
(a) If the fault continues:
- replace the XCVR-RA, 1 (2SA1) (Ref. AMM TASK 34-42-33-000-001) (Ref. AMM TASK 34-42-33-400-001).
B. Do the test given in para. 3.
TASK 34-42-00-810-835
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)
