3 If the resistance is between 280 and 400 ohms:
_
a Remove the FCDC-1 (3CE1) (Ref. AMM TASK 27-95-34-000-001).
_
- if the warning SEC3 stays, install the FCDC-1 (3CE1) (Ref. AMM TASK 27-95-34-400-001) and see Para. b_.
- if the warning SEC3 goes off, replace the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
- install the SEC3 (Ref. AMM TASK 27-94-34-400-001).
b Remove the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001).
_
- if the warning SEC3 stays, install the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-400-001) and see Para. c_.
- if the warning SEC3 goes off, replace the FCDC-2 (3CE2) (Ref. AMM TASK 27-95-34-000-001) and (Ref. AMM TASK 27-95-34-400-001).
- install the SEC3 (Ref. AMM TASK 27-94-34-400-001).
c Remove the RLY- SEC 3 ANN SPLY (41CE3) (Ref. IPC 27920803).
_
- if the warning SEC3 stays, install the RLY-SEC 3 ANN SPLY (41CE3) (Ref. IPC 27920803) and see Para. d_.
- if the warning SEC3 goes off, replace the RLY-SEC 3 ANN SPLY (41CE3) (Ref. IPC 27920803).
- install the SEC3 (Ref. AMM TASK 27-94-34-400-001).
d Do a check and repair the wiring of the DSI 20/5 (SEC 3
_ FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 3 ANN SPLY (41CE3) (Ref. ASM 27-95/04) and (Ref. ASM 27-95/05).
e Install the SEC3 (Ref. AMM TASK 27-94-34-400-001).
_
(2) If the flight controls do not move according to the SEC3 servoing:
- do a check of the circuit breaker (21CE3) status:
(a) If the circuit breaker is closed:
- do a check for + 28VDC at pin AC/2 for the COM part or AF/2 for the MON part of the SEC3 (1CE3) (Ref. ASM 27-92/04).
1 If there is 28VDC:
_
- replace the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001). If the fault continues:
「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 A222
Feb 01/03R CES
a Do a check of the wiring of the 28VDC GND signal from the
_ SEC3 (1CE3) COM part and MON part to the ground terminal (Ref. ASM 27-92/04).
- if there is no continuity, repair the above wiring
- if there is continuity, see Para. b_.
b Do a check of the wiring of the SEC3 ENGAGED (DSI 01)
_ signal from the SEC3 (1CE3) COM part and MON part to the first terminal block (Ref. ASM 27-92/04).
- if there is no continuity, repair the above wiring
- if there is continuity, see Para. c_.
c Do a check of the wiring from the pins A/C1 and A/C3 of the
_ pushbutton switch (5CE3) to the first terminal block (Ref. ASM 27-92/04).
- if there is no continuity, repair the above wiring
- if there is continuity, see Para. d_.
d Replace the P/BSW-FLT CTL/SEC 3 (5CE3) (Ref. IPC 27920802).
_ If the fault continues:
- do a check and repair the wiring of DGO 03 signal from the SEC3 (1CE3) COM part to MON part and MON part to COM part (Ref. ASM 27-92/54).
2 If there is no 28VDC:
_
- do a check and repair the wiring from the circuit breaker (21CE3) to the first terminal block (Ref. ASM 27-92/04).
(b) If the circuit breaker is open:
- close it.
(c) If its trips again:
- replace the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-000-001) and (Ref. AMM TASK 27-94-34-400-001).
1 If the fault continues:
_
- do a check for a short to ground at the wiring between the SEC3 (1CE3) pin AC/2 for the COM part and AF/2 for the MON part to the circuit breaker (21CE3) (Ref. ASM 27-92/04).
a If there is a short to ground, repair the above wiring.
_
b If there is no short to ground, replace the circuit breaker
_
(21CE3).
C. 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 ∞∞27-94-00∞∞∞∞∞∞∞∞∞∞Page A223
Feb 01/03R CES
Loss of the BUS 3 Signal for the SEC 3
1. Possible Causes
_______________
- SEC-3 (1CE3)
- wiring of the DGO3 signal from the SEC 3 (1CE3) MON part to the COM part
- wiring of the DG03 signal from the SEC 3 (1CE3) COM part to the MON part
2. Job Set-up Information
______________________
A. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
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本文链接地址：A320 Trouble Shooting Manual 排故手册 飞行操纵 3(125)
