R TASK 24-20-00-810-878
R Failure of the GCU 1 Air/Ground Status R 1. Possible Causes
_______________
R - GCU-1 (1XU1) R - LGCIU-1 (5GA1) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-22-34-000-001 Removal of the GCU-1(2) (1XU1, 1XU2)
R AMM 24-22-34-400-001 Installation of the GCU-1(2) (1XU1, 1XU2)
R AMM 24-41-00-740-002 Operational Check of GAPCU via CFDS
R AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
R AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
R ASM 24-22/01
R 3. Fault Confirmation__________________
R A. Test
R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R (a) If the BITE test gives the message TEST FAILED:
R - do the trouble shooting given in Para 4.A.
R (b) If the BITE test gives the message TEST PASSED:
R - do the trouble shooting given in Para 4.B. R 4. Fault Isolation
_______________
R A. If the BITE test gives the message TEST FAILED:
R - push the line key adjacent to the TEST FAILED message.
R (1) If the maintenance message GCU1 (1XU1) comes into view:
R - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref.
R AMM TASK 24-22-34-400-001).
「一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一一1R EFF : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page A283
Aug 01/05 CES
R B. If the BITE test gives the message TEST PASSED:
R (1) Do the trouble shooting for chapter-32 CFDS messages related to the
R LGCIU 1.
R (2) If there are no CFDS messages related to the LGCIU 1:
R - do a check of the ground/flight status wiring for a short circuit
R or a short to ground between pin A/2C of the GCU 1 and pin B/9E of
R the LGCIU 1 (5GA1) (Ref. ASM 24-22/01).
R (a) If there is no continuity:
R - repair or replace as necessary.
R (b) If there is continuity:
R - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and
R (Ref. AMM TASK 24-22-34-400-001).
R 1_ If the fault continues:
R - replace the LGCIU-1 (5GA1) (Ref. AMM TASK 32-31-71-000-001)
R and (Ref. AMM TASK 32-31-71-400-001).
R C. Do the test given in para. 3.
R TASK 24-20-00-810-879
R Failure of the GCU 2 Air/Ground Status R 1. Possible Causes
_______________
R - GCU-2 (1XU2) R - LGCIU-1 (5GA1) R - wiring
R 2. Job Set-up Information
______________________
R A. Referenced Information
R -------------------------------------------------------------------------------R REFERENCE DESIGNATION R -------------------------------------------------------------------------------
R AMM 24-22-34-000-001 Removal of the GCU-1(2) (1XU1, 1XU2)
R AMM 24-22-34-400-001 Installation of the GCU-1(2) (1XU1, 1XU2)
R AMM 24-41-00-740-002 Operational Check of GAPCU via CFDS
R AMM 32-31-71-000-001 Removal of the LGCIU (5GA1, 5GA2)
R AMM 32-31-71-400-001 Installation of the LGCIU (5GA1, 5GA2)
R ASM 24-22/01
R 3. Fault Confirmation__________________
R A. Test
R (1) Do the BITE test of the GAPCU (Ref. AMM TASK 24-41-00-740-002).
R (a) If the BITE test gives the message TEST FAILED:
R - do the trouble shooting given in Para 4.A.
R (b) If the BITE test gives the message TEST PASSED:
R - do the trouble shooting given in Para 4.B. R 4. Fault Isolation
_______________
R A. If the BITE test gives the message TEST FAILED:
R - push the line key adjacent to the TEST FAILED message.
R (1) If the maintenance message GCU2 (1XU2) comes into view:
R - replace the GCU-2 (1XU2) (Ref. AMM TASK 24-22-34-000-001) and (Ref.
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