R b_ Do a check of the resistance of the relay between pin X1
R and X2.
R - If the resistance is more than 400 ohms:
R . replace the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. IPC R 27920803).
R . install the SEC 3 (Ref. AMM TASK 27-94-34-400-001). R - If the resistance is between 280 and 400 ohms:
R . do a check and repair the wiring of the RLY SEC FAULT R signal from the relay to the SEC (Ref. ASM 27-92/05)
R . install the relay
R . install the SEC 3 (Ref. AMM TASK 27-94-34-400-001).
R 3_ If the resistance is between 280 and 400 ohms:
R a_ Remove the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. IPCR 27920803).
「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 : ALL ∞∞27-94-00∞∞∞∞∞∞∞∞∞∞Page A272
Aug 01/05 CES
R - if the warning SEC3 stays, install the relay (Ref. IPC
R 27920803) and see Para. b_.
R - if the warning SEC3 goes off, replace the RELAY-SEC 3 ANN
R SPLY (41CE3) (Ref. IPC 27920803)
R - install the SEC 3 (Ref. AMM TASK 27-94-34-400-001).
R b_ Do a check and repair the wiring of the DSI 20/5 (SEC 3
R FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2)
R to the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. ASM 27-95/04) and
R (Ref. ASM 27-95/05).
R c_ Install the SEC 3 (Ref. AMM TASK 27-94-34-400-001).
R B. Do the test given in Para. 3.
FCDC SYSTEM (FLIGHT CONTROL DATA CONCENTRATOR) - FAULT ISOLATION PROCEDURES
___________________________________________________________________________
TASK 27-95-00-810-801
Loss of the FCDC2 Fail Discrete Signal for the FCDC1
1. Possible Causes
_______________
- FCDC-2 (3CE2)
- FCDC-1 (3CE1)
- wiring of the OPP FCDC FAILED (DSI 17/5) signal
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 27-95-34-000-001 Removal of the FCDC (3CE1,3CE2) AMM 27-95-34-400-001 Installation of the FCDC (3CE1,3CE2) R AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning) ASM 27-95/04
3. Fault Confirmation
__________________
A. Test
(1) Do the BITE test of the EFCS (ground scanning) (Ref. AMM TASK 27-96-00-740-001).
4. Fault Isolation
_______________
A. If the BITE test gives the maintenance message OPP FCDC FAIL DISCR:
- do a check of the wiring of the OPP FCDC FAILED (DSI 17/5) signal from the FCDC2 (3CE2) to the FCDC1 (3CE1) (Ref. ASM 27-95/04).
(1) If the fault continues:
- replace the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
(2) If the fault continues:
- replace the FCDC-1 (3CE1) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
B. Do the test given in Para. 3.
「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 : ALL ∞∞27-95-00∞∞∞∞∞∞∞∞∞∞Page 201
Nov 01/01 CES
Failure of the FCDC2
1. Possible Causes
_______________
- FCDC-2 (3CE2)
- wiring of the 28VDC GND signal
- wiring of the +28VDC signal
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------
REFERENCE DESIGNATION
-------------------------------------------------------------------------------
AMM 27-95-34-000-001 Removal of the FCDC (3CE1,3CE2) AMM 27-95-34-400-001 Installation of the FCDC (3CE1,3CE2) R AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning) ASM 27-92/07
3. Fault Confirmation
__________________
A. Test
(1) Do the BITE test of the EFCS (ground scanning) (Ref. AMM TASK 27-96-00-740-001).
4. Fault Isolation
_______________
A. If the BITE test gives the maintenance message:
FCDC2
- replace the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
(1) If the fault continues:
(a) Do a check of the wiring of the 28VDC GND signal from the FCDC2 (3CE2) to the ground terminal (Ref. ASM 27-92/07).
