R **ON A/C 051-099,
R TASK 34-41-00-810-811
R Failure of the Weather Radar Antenna (System 2)
R 1. Possible Causes_______________
R - XCVR-WEATHER RADAR, 2 (1SQ2)
R - DRIVE-WR ANTENNA (7SQ)
R - wiring between the WR antenna drive (7SQ) and the weather radar
R transceiver 2 (1SQ2)
R 2. Job Set-up Information______________________
R A. Referenced Information
R -------------------------------------------------------------------------------
R REFERENCE DESIGNATION
R -------------------------------------------------------------------------------
R AMM 34-41-00-740-002
R AMM 34-41-11-000-002
R
R AMM 34-41-11-400-006
R
R AMM 34-41-33-000-004
R AMM 34-41-33-400-003
R
R ASM 34-41/01
R 3. Fault Confirmation
__________________ R A. Test
BITE Test of the Weather Radar
Removal of the Antenna Assembly - Weather Radar
(7SQ,11SQ)
Installation of the Antenna Assembly - Weather Radar
(7SQ,11SQ)
Removal of the Weather Radar Transceiver (1SQ1, 1SQ2)
Installation of the Weather Radar Transceiver (1SQ1,
1SQ2)
R (1) Do the BITE test of the weather radar (Ref. AMM TASK 34-41-00-740-R 002).
R 4. Fault Isolation
_______________
R A. If the BITE test gives the maintenance message WXR ANTENNA (11SQ):
R - replace the XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-000-
R 004) and (Ref. AMM TASK 34-41-33-400-003).
R (1) If the fault continues:
R - replace the DRIVE-WR ANTENNA (7SQ) (Ref. AMM TASK 34-41-11-000-002)
R and (Ref. AMM TASK 34-41-11-400-006).
R (a) If the fault continues:
R - do a check and repair the wiring between the WR antenna drive
R (7SQ) and the weather radar transceiver 2 (1SQ2) (Ref. ASM 34-
R 41/01).
R B. Do the test given in para. 3.
R **ON A/C ALL
TASK 34-41-00-810-812
Failure of the Weather Radar Control Unit (System 1)
1. Possible Causes
_______________
- XCVR-WEATHER RADAR, 1 (1SQ1)
- CTL UNIT-WEATHER RADAR (3SQ)
- wiring of the CONTROL BUS from the weather radar control unit (3SQ) to the weather radar transceiver 1 (1SQ1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 34-41-00-740-002 BITE Test of the Weather Radar
AMM 34-41-12-000-001 Removal of the Weather Radar Control Unit (3SQ)
AMM 34-41-12-400-001 Installation of the Weather Radar Control Unit (3SQ)
AMM 34-41-33-000-004 Removal of the Weather Radar Transceiver (1SQ1, 1SQ2)
AMM 34-41-33-400-003 Installation of the Weather Radar Transceiver (1SQ1,
1SQ2)
ASM 34-41/01
3. Fault Confirmation
__________________
A. Test
(1) Do the BITE test of the weather radar (Ref. AMM TASK 34-41-00-740-002).
4. Fault Isolation
_______________
R **ON A/C 001-049, 101-105, 151-199,
A. If the BITE test gives the maintenance message WXR CTL PNL (3SQ)/WXR1 (1SQ1):
- replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
(1) If the fault continues:
- replace the CTL UNIT-WEATHER RADAR (3SQ) (Ref. AMM TASK 34-41-12-000-001) and (Ref. AMM TASK 34-41-12-400-001).
(a) If the fault continues:
- do a check and repair the wiring of the CONTROL BUS from the weather radar control unit (3SQ) to the weather radar transceiver 1 (1SQ1) (Ref. ASM 34-41/01).
R **ON A/C 051-099, 106-149, 201-299, 301-399, 401-499,
A. If the BITE test gives the maintenance message WXR CNT PNL (3SQ)/WXR1 (1SQ1):
- replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
(1) If the fault continues:
- replace the CTL UNIT-WEATHER RADAR (3SQ) (Ref. AMM TASK 34-41-12-000-001) and (Ref. AMM TASK 34-41-12-400-001).
(a) If the fault continues:
- do a check and repair the wiring of the CONTROL BUS from the weather radar control unit (3SQ) to the weather radar transceiver 1 (1SQ1) (Ref. ASM 34-41/01).
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