R TASK 24-20-00-810-932

R  Failure of the GCU 1 Pin Programming 
R  1. Possible Causes_______________ 
R  - GCU-1 (1XU1) 
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  ASM 24-22/02 
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).

R B. If the BITE test gives the message TEST PASSED:
R - do a check of the pin programming wiring (Ref. ASM 24-22/02) of the GCU
R 1:

R . pin A/5A connected to ground

R . pin A/3E connected to ground

R . pin A/4G connected to ground

R . pins A/7C, A/8A, A/2E and A/5E not connected.

 「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 : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page C225
 Aug 01/05 CES

R  NOTE : The wiring diagram of the aircraft interface with the pin____ 
R  programming connections is necessary to do the trouble shooting 
R  procedure. 
R  (1) If the wiring is not correct: 
R  - repair or replace as necessary. 
R  (2) If the wiring is correct: 
R  - replace the GCU-1 (1XU1) (Ref. AMM TASK 24-22-34-000-001) and (Ref. 
R  AMM TASK 24-22-34-400-001). 
R  C. Do the test given in para. 3.

R TASK 24-20-00-810-933

R  Failure of the GCU 2 Pin Programming 
R  1. Possible Causes_______________ 
R  - GCU-2 (1XU2) 
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  ASM 24-22/03 
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.
R AMM TASK 24-22-34-400-001).

R B. If the BITE test gives the message TEST PASSED:
R - do a check of the pin programming wiring (Ref. ASM 24-22/03) of the GCU
R 2:

R . pin A/5A connected to ground

R . pin A/3E connected to ground

R . pin A/5E connected to ground

R . pins A/7C, A/8A, A/2E and A/4G not connected.

 「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 : 401-499, ∞∞24-20-00∞∞∞∞∞∞∞∞∞∞Page C227
　
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