- do a check of the wiring between the RA transmission antenna 1 (6SA1) and the RA transceiver 1 (2SA1) (Ref. ASM 34-42/01).
 1 If there is no continuity:
_ - repair the above wiring.
 2 If there is continuity:
_
 - replace the ANTENNA-RA RCPTN, 1 (5SA1) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
 a If the fault continues:
_
 - replace the ANTENNA-RA XMSN, 1 (6SA1) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
 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 : ALL ∞∞34-42-00∞∞∞∞∞∞∞∞∞∞Page 231
 Feb 01/05R
 CES  Failure of the RA Antennas 2

 1. Possible Causes_______________
 - XCVR-RA, 2 (2SA2)

 - ANTENNA-RA RCPTN, 2 (5SA2)

 - ANTENNA-RA XMSN, 2 (6SA2)

 - wiring between the RA reception antenna 2 (5SA2) and the RA transceiver 2 (2SA2)

 - wiring between the RA transmission antenna 2 (6SA2) and the RA transceiver 2 (2SA2)

 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 34-42/02
 3. Fault Confirmation__________________
 A. Test
 (1) Do the BITE test of the radio altimeter (Ref. AMM TASK 34-42-00-740-002).
 「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 : ALL ∞∞34-42-00∞∞∞∞∞∞∞∞∞∞Page 232
 Feb 01/05R
 CES

 4. Fault Isolation
_______________

 A. If the BITE test gives the maintenance message CHECK LRRA-2 ANTENNAE CIRCUITS:
 - replace the XCVR-RA, 2 (2SA2) (Ref. AMM TASK 34-42-33-000-001) and (Ref. AMM TASK 34-42-33-400-001).
 (1) If the fault continues:
 - do a check of the wiring between the RA reception antenna 2 (5SA2) and the RA transceiver 2 (2SA2) (Ref. ASM 34-42/02).
 (a) If there is no continuity:

 - repair the above wiring.

 (b) If there is continuity:

 - do a check of the wiring between the RA transmission antenna 2 (6SA2) and the RA transceiver 2 (2SA2) (Ref. ASM 34-42/02).
 1 If there is no continuity:
_ - repair the above wiring.
 2 If there is continuity:
_
 - replace the ANTENNA-RA RCPTN, 2 (5SA2) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
 a If the fault continues:
_
 - replace the ANTENNA-RA XMSN, 2 (6SA2) (Ref. AMM TASK 34-42-11-000-001) and (Ref. AMM TASK 34-42-11-400-001).
 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 : ALL ∞∞34-42-00∞∞∞∞∞∞∞∞∞∞Page 233
 Feb 01/05R
 CES  Fan of the RA Transceiver 1 Inoperative

 1. Possible Causes
_______________
 - XCVR-RA, 1 (2SA1)

 - FAN-RA XCVR 1 (3SA1)

 - wiring between the fan of the RA transceiver 1 (3SA1) and the RA transceiver 1 (2SA1)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------
REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 34-42-00-750-001 Operational Check and Detailed Inspection for Contamination of the Radio Altimeter Fan 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 AMM 34-42-45-000-001 Removal of the Radio Altimeter-Transceiver Fan 3SA1 (3SA2) AMM 34-42-45-400-001 Installation of the Radio Altimeter-Transceiver Fan 3SA1 (3SA2) ASM 34-42/01
 3. Fault Confirmation
__________________
　
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