R NOTE : Do the test that follows with the ATT HDG selector switch (13FP),
____ R on the SWITCHING panel 8VU, at F/O/3.
R Do the BITE test of the weather radar (system 2) (Ref. AMM TASK 34-41-00-R 740-002).
R 4. Fault Isolation
_______________
R A. If the test gives the maintenance message ADIRU3 (1FP3) IR BUS/WXR2
R (1SQ2):
R - swap the ADIRU-3 (1FP3) and the ADIRU1 (Ref. AMM TASK 34-12-34-000-001)
R and (Ref. AMM TASK 34-12-34-400-001).

R (1) If the fault stops:
R - replace the ADIRU that you installed on side 1.

R  (2) If the fault continues: 
R  - replace the XCVR-WEATHER RADAR, 2 (1SQ2) (Ref. AMM TASK 34-41-33-
R  000-004) and (Ref. AMM TASK 34-41-33-400-003). 
R  (a) If the fault continues: 
R  - remove the weather radar transceiver 2 
R  - remove the ADIRU3 
R  - do a check and repair the wiring from the ADIRU3 to the weather 
R  radar transceiver 2: from pins AB/5E, 6E of the ADIRU3 to pins 
R  AB/12G, 13G of the weather radar transceiver 2 (Ref. ASM 34-
R  41/01) 
R  - install the weather radar transceiver 2 
R  - install the ADIRU3. 
R  B. Do the test given in para. 3.

R  TASK 34-41-00-810-833 
R  Loss of the Radio Altimeter Data on the Weather Radar Transceiver 2 
R  1. Possible Causes_______________ 
R  - XCVR-WEATHER RADAR, 2 (1SQ2) 
R  - XCVR-RA, 1 (2SA1) 
R  - XCVR-RA, 2 (2SA2) 
R  - wiring from the radio altimeter transceiver 1 to the weather radar 
R  transceiver 2 
R  - wiring from the radio altimeter transceiver 2 to the weather radar 
R  transceiver 2 
R  2. Job Set-up Information______________________ 
R  A. Referenced Information 
R  -------------------------------------------------------------------------------
R  REFERENCE  DESIGNATION 
R  -------------------------------------------------------------------------------

R  AMM  34-41-00-740-002 
R  AMM  34-41-33-000-004 
R  AMM  34-41-33-400-003 
R 
R  AMM  34-42-33-000-001 
R 
R  AMM  34-42-33-400-001 
R 
R  ASM  34-41/02 

R 3. Fault Confirmation
__________________ R A. Test
BITE Test of the Weather Radar Removal of the Weather Radar Transceiver (1SQ1, 1SQ2) Installation of the Weather Radar Transceiver (1SQ1, 1SQ2) Removal of the Radio Altimeter Transceiver 2SA1 and 2SA2 Installation of the Radio Altimeter Transceiver 2SA1 and 2SA2
R Do the BITE test of the weather radar (Ref. AMM TASK 34-41-00-740-002).
R 4. Fault Isolation
_______________
R A. If the test gives the maintenance message RA1(2SA1)+RA2(2SA2)/WXR2(1SQ2):
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 test does not give the maintenance message
R RA1(2SA1)+RA2(2SA2)/WXR2(1SQ2):
R - read the CLASS 3 FAULTS report for the maintenance message related
R to a radio altimeter fault.

R (a) If the CLASS 3 FAULTS report gives the maintenance message
R RA1(2SA1)/WXR2(1SQ2):
R - replace the XCVR-RA, 1 (2SA1) (Ref. AMM TASK 34-42-33-000-001)
R and (Ref. AMM TASK 34-42-33-400-001).

 「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 : 051-099, ∞∞34-41-00∞∞∞∞∞∞∞∞∞∞Page 264
 May 01/05 CES

R  1_  If the fault continues:
R  - remove the weather radar transceiver 2 
R  - remove the radio altimeter transceiver 1 
R  - do a check and repair the wiring from the radio altimeter 
R  transceiver 1 to the weather radar transceiver 2: from pins 
R  AB/2G, 3G to pins AB/1C, 2C (Ref. ASM 34-41/02) 
R  - install the weather radar transceiver 2 
R  - install the radio altimeter transceiver 1. 
R  (b) If the CLASS 3 FAULTS report gives the maintenance message 
R  RA2(2SA2)/WXR2(1SQ2): 
R  - replace the XCVR-RA, 2 (2SA2) (Ref. AMM TASK 34-42-33-000-001) 
R  and (Ref. AMM TASK 34-42-33-400-001). 
R  1_  If the fault continues:
R  - remove the weather radar transceiver 2 
R  - remove the radio altimeter transceiver 2 
R  - do a check and repair the wiring from the radio altimeter 
　
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