A. If during the operational test the horizontal electrical control of the First Officer seat is inoperative:
- replace the SEAT-F/O (4MS) (Ref. AMM TASK 25-11-51-000-001) and (Ref. AMM TASK 25-11-51-400-001).
Electrical Controls of the Captain Seat Inoperative
1. Possible Causes
_______________
- SEAT-CAPTAIN (3MS)
- wiring between the Captain seat (3MS) and the circuit breaker (1MS1)
- C/B - COCKPIT SEATS/SEAT CTL/CAPT (1MS1)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 25-11-00-710-001 Operational Test of the Captain and First Officer
Seats (3MS, 4MS) AMM 25-11-51-000-001 Removal of the Captain/First Officer Seat (3MS, 4MS) AMM 25-11-51-400-001 Installation of the Captain/First Officer Seat (3MS,
4MS) ASM 25-11/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the Captain and First Officer seats (3MS, 4MS) (Ref. AMM TASK 25-11-00-710-001).
NOTE : Do the test of the Captain seat only.
____
4. Fault Isolation
_______________
A. If during the operational test the Captain seat electrical controls are inoperative:
- do a check of the configuration of the circuit breaker (1MS1) on the panel 122VU.
(1) If the circuit breaker is closed:
- do a check for 115VAC at pins A-B-C of the Captain seat (3MS) (Ref. ASM 25-11/01).
(a) If there is 115VAC:
- replace the SEAT-CAPTAIN (3MS) (Ref. AMM TASK 25-11-51-000-001) and (Ref. AMM TASK 25-11-51-400-001).
(b) If there is no 115VAC:
- do a check for a ground signal at pin D of the Captain seat (3MS) (Ref. ASM 25-11/01).
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 EFF : ALL ∞∞25-11-00∞∞∞∞∞∞∞∞∞∞Page 205
Feb 01/98 CES 1 If there is no ground signal:
_
- repair the above wiring.
2 If there is a ground signal:
_
- do a check of the wiring between the Captain seat (3MS) and the circuit breaker (1MS1) (Ref. ASM 25-11/01).
a If there is no continuity:
_
- repair the above wiring.
b If there is continuity:
_ - replace the C/B - COCKPIT SEATS/SEAT CTL/CAPT (1MS1).
(2) If the circuit breaker is open:
- close it.
(a) If it trips again:
- replace the SEAT-CAPTAIN (3MS) (Ref. AMM TASK 25-11-51-000-001) and (Ref. AMM TASK 25-11-51-400-001).
1 If the fault continues:
_
- do a check for a short to ground at the wiring between the Captain seat (3MS) and the circuit breaker (1MS1) (Ref. ASM 25-11/01).
a If there is a short to ground:
_
- repair the above wiring. b If there is no short to ground:
_ - replace the C/B - COCKPIT SEATS/SEAT CTL/CAPT (1MS1).
B. Do the test given in Para. 3.
Electrical Controls of the First Officer Seat Inoperative
1. Possible Causes
_______________
- SEAT-F/O (4MS)
- wiring between the First Officer seat (4MS) and the circuit breaker (1MS2)
- C/B - COCKPIT SEATS/SEAT CTL/F/O (1MS2)
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
AMM 25-11-00-710-001 Operational Test of the Captain and First Officer
Seats (3MS, 4MS) AMM 25-11-51-000-001 Removal of the Captain/First Officer Seat (3MS, 4MS) AMM 25-11-51-400-001 Installation of the Captain/First Officer Seat (3MS,
4MS) ASM 25-11/01
3. Fault Confirmation
__________________
A. Test
(1) Do the operational test of the Captain and First Officer seats (3MS, 4MS) (Ref. AMM TASK 25-11-00-710-001).
NOTE : Do the test of the First Officer seat only.
____
4. Fault Isolation
_______________
A. If during the operational test the First Officer seat electrical controls are inoperative:
- do a check of the configuration of the circuit breaker (1MS2) on the panel 122VU.
(1) If the circuit breaker is closed:
- do a check for 115VAC at pins A-B-C of the First Officer seat (4MS) (Ref. ASM 25-11/01).
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