4. Fault Isolation
_______________
R **ON A/C 001-049, 101-149, 151-199, 201-299, 301-399, 401-499,
A. If the test gives the maintenance message DMC3 : NO WXR 2 DATA or DMC3 : NO WXR1 CH2 DATA :
(1) on the weather radar control unit (3SQ), do a check of the position of the system selector switch.
(a) If the weather radar system 1 is set:
- replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) and (Ref. AMM TASK 34-41-33-400-003).
(b) If the weather radar system 2 is set:
- do a check and repair the wiring of the TR1 DATA BUS 2 OUTPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block (Ref. ASM 34-41/01).
**ON A/C 051-099,
A. If the test gives the maintenance message DMC3 : NO WXR 2 DATA or DMC3 : NO WR1/2 CH2 DATA :
- 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 XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-000-004) (Ref. AMM TASK 34-41-33-400-003)
(2) If the fault continues:
- do a check of the wiring of the TR1 DATA BUS 2 OUTPUT bus from the weather radar transceiver 1 (1SQ1) to the first terminal block (Ref. ASM 34-41/01).
(a) If there is no continuity:
- repair the above wiring.
(b) If there is continuity:
- do a check and repair the wiring of the TR2 DATA BUS 2 OUTPUT bus from the weather radar transceiver 2 (1SQ2) to the first terminal block (Ref. ASM 34-41/01).
**ON A/C ALL
B. Do the test given in Para. 3.B.
「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 ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 228
Aug 01/05 CES Failure of the Weather Radar Antenna (System 1)
1. Possible Causes
_______________
- XCVR-WEATHER RADAR, 1 (1SQ1)
- DRIVE-WR ANTENNA (7SQ)
- wiring between the WR antenna drive (7SQ) and 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 34-41-11-000-002 Removal of the Antenna Assembly - Weather Radar (7SQ,11SQ) AMM 34-41-11-000-006 Removal of the Antenna Assembly - Weather Radar (7SQ,11SQ) AMM 34-41-11-400-006 Installation of the Antenna Assembly - Weather Radar (7SQ,11SQ) AMM 34-41-11-400-008 Installation of the Antenna Assembly - Weather Radar
(7SQ,11SQ) 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).
「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 ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 229
May 01/05R
CES
4. Fault Isolation
_______________
**ON A/C 001-049, 101-105, 151-199,
A. If the BITE test gives the maintenance message WXR ANTENNA (11SQ):
- 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 DRIVE-WR ANTENNA (7SQ) (Ref. AMM TASK 34-41-11-000-006) and (Ref. AMM TASK 34-41-11-400-008).
(a) If the fault continues:
- do a check and repair the wiring between the WR antenna drive (7SQ) and 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 ANTENNA (11SQ):
- 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 DRIVE-WR ANTENNA (7SQ) (Ref. AMM TASK 34-41-11-000-002) and (Ref. AMM TASK 34-41-11-400-006).
(a) If the fault continues:
- do a check and repair the wiring between the WR antenna drive (7SQ) and the weather radar transceiver 1 (1SQ1) (Ref. ASM 34-41/01).
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