- install the WEATHER RADAR-XCVR 1 (1SQ1) and the WEATHER RADAR-XCVR 2 (1SQ2) (Ref. AMM TASK 34-41-33-400-003)

R **ON A/C 401-499,
 A. If the test gives the maintenance message WXR1(1SQ1)/DU ND FO(3WT2)/DMC3 (1WT3):
 - replace the DMC-3 (1WT3) (Ref. AMM TASK 31-63-34-000-001) (Ref. AMM TASK 31-63-34-400-001)
 (1) If the fault continues:

 - replace the ND-F/O (3WT2) (Ref. AMM TASK 31-63-22-000-001) (Ref. AMM TASK 31-63-22-400-001)

 (2) If the fault continues:

 - replace the XCVR-WEATHER RADAR, 1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004) (Ref. AMM TASK 34-41-33-400-003)

 (3) If the fault continues:

 - remove the DMC3 (1WT3) (Ref. AMM TASK 31-63-34-000-001)

 - remove the FO ND DU (3WT2) (Ref. AMM TASK 31-63-22-000-001)

 - remove the WEATHER RADAR-XCVR1 (1SQ1) (Ref. AMM TASK 34-41-33-000-004)

 (a) Check the wiring of the WXR1 OUTPUT BUS from the DMC3 (1WT3) pins AB/14B, 14C to the FO ND DU (3WT2) (Ref. ASM 31-61/00)
 「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 051-099, 401-499, ∞∞31-63-81∞∞∞∞∞∞∞∞∞∞Page B209
 Aug 01/05 CES

 (b) Check the wiring between the DMC3 (1WT3) and the WEATHER RADAR-XCVR 1 (1SQ1) (Ref. ASM 31-62/00) (Ref. ASM 34-41/00)
 - install the DMC3 (1WT3) (Ref. AMM TASK 31-63-34-400-001)

 - install the FO ND DU (3WT2) (Ref. AMM TASK 31-63-22-400-001)

 - install the WEATHER RADAR-XCVR1 (1SQ1) (Ref. AMM TASK 34-41-33-400-003)

R **ON A/C 051-099, 401-499,
 B. Do the test given in Para. 3.A.

R **ON A/C 401-499,

 TASK 31-63-81-810-901 Loss of the LGCIU 1 Discrete on the DMC 1
 1. Possible Causes
_______________
 - DMC-1 (1WT1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 31-60-00-740-007 GROUND SCANNING Test of the DMC
 AMM 31-63-34-000-001 Removal of the DMC (1WT1,1WT2,1WT3)
 AMM 31-63-34-400-001 Installation of the DMC (1WT1,1WT2,1WT3)
 ASM 31-62/00

 3. Fault Confirmation

__________________
 A. Test Do the Ground Scanning Test of the DMC (Ref. AMM TASK 31-60-00-740-007).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance message LGCIU1 FLIGHT DISCRETE (5GA1)/ DMC1(1WT1):
 - replace the DMC-1 (1WT1) (Ref. AMM TASK 31-63-34-000-001) and (Ref. AMM TASK 31-63-34-400-001)
 (1) if the fault continues:
 - check the wiring from DMC1 (1WT1) pins AD/7J, 7K to the first terminal block (Ref. ASM 31-62/00)
 B. Do the test given in Para. 3.A.

 Loss of the LGCIU 1 Discrete on the DMC's
 1. Possible Causes
_______________
 - LGCIU-1 (5GA1)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION
 -------------------------------------------------------------------------------
AMM 31-60-00-740-007 GROUND SCANNING Test of the DMC
 AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
 AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
 ASM 31-62/00

 3. Fault Confirmation
__________________
 A. Test Do the Ground Scanning Test of the DMC (Ref. AMM TASK 31-60-00-740-007).
 4. Fault Isolation
_______________
 A. If the test gives the maintenance messages LGCIU1 FLIGHT DISCRETE (5GA1)/ DMC1(1WT1) and LGCIU1 FLIGHT DISCRETE (5GA1)/DMC2(1WT2) and LGCIU1 FLIGHT DISCRETE (5GA1)/DMC3(1WT3):
 - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001) and (Ref. AMM TASK 32-31-71-400-001)
 (1) if the fault continues:
 - check the wiring from LGCIU1(5GA1) pins AA/13K, 15K and pins AA/13J, 15J to the first terminal block (Ref. ASM 31-62/00)
 B. Do the test given in Para. 3.A.

 TASK 31-63-81-810-903 Loss of the LGCIU 1 Discrete on the DMC 2
 1. Possible Causes
_______________
 - DMC-2 (1WT2)

 - wiring

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
　
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