- do a check and repair the wiring of the DGO3 signal from the SEC 2 (1CE2) COM part to the MON part if the maintenance message is SEC 2 COM BUS 3 (Ref. ASM 27-92/54).

 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 ∞∞27-94-00∞∞∞∞∞∞∞∞∞∞Page A219
 Feb 01/03R CES

 Failure of the SEC 3
 1. Possible Causes
_______________
 - RELAY-SEC 3 ANN SPLY (41CE3)
 - SEC-3 (1CE3) R
 - FCDC-1 (3CE1)

 - FCDC-2 (3CE2)

 - wiring of the RLY SEC FAULT signal from the relay to the SEC3

 - RLY- SEC 3 ANN SPLY (41CE3)

 - wiring of the DSI 20/5 (SEC 3 FAILED) signals

 - wiring of the 28VDC GND signal

 - wiring of the SEC3 ENGAGED (DSI 01) signal

 - wiring from the pins A/C1 and A/C3 of the pushbutton switch (5CE3) to the first terminal block

 - P/BSW-FLT CTL/SEC 3 (5CE3)

 - wiring of DGO 03 signal

 - wiring from the circuit breaker (21CE3) to the first terminal block

 - wiring between the SEC3 (1CE3) pin AC/2 for the COM part and AF/2 for the MON part to the circuit breaker (21CE3)

 2. Job Set-up Information
______________________
 A. Referenced Information
 -------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
IPC 27920802 IPC 27920803 AMM 27-94-00-710-001 Operational Test of the Spoiler Elevator Computer 3
 (SEC 3)
 AMM 27-94-34-000-001 Removal of the SEC (1CE1,1CE2,1CE3)
 AMM 27-94-34-400-001 Installation of the SEC (1CE1,1CE2,1CE3)
 AMM 27-95-34-000-001 Removal of the FCDC (3CE1,3CE2)
 AMM 27-95-34-400-001 Installation of the FCDC (3CE1,3CE2)
 AMM 27-96-00-740-001 BITE Test of the EFCS (Ground Scanning)
 ASM 27-92/04
 ASM 27-92/05
 ASM 27-92/54
 ASM 27-95/04
 ASM 27-95/05

 「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 A220
 Aug 01/05 CES

 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. Table of the circuit breakers used in this procedure:
 -------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------
121VU FLIGHT CONTROLS/SEC3/SPLY  21CE3 Q19
 B. Do the operational test of the SEC3 (Ref. AMM TASK 27-94-00-710-001) to make sure that the SEC3 servoes its associated surfaces.
 (1) If the flight controls move according to the SEC3 servoing:
 (a) Remove the SEC3 (Ref. AMM TASK 27-94-34-000-001).

 (b) At the SEC3 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A (Ref. ASM 27-92/05).

 1 If the resistance is less than 280 ohms:
_
 a Remove the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. IPC
_
 27920803).

 b Do a check of the resistance of the relay between pin X1
_
 and X2.

 - If the resistance is less than 280 Ohms: . replace the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. IPC 27920803) . replace the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-400-001).

 - If the resistance is between 280 and 400 ohms: . do a check and repair the wiring of the RLY SEC FAULT signal from the relay to the SEC3 (Ref. ASM 27-92/05) . install the relay

R  . replace the SEC-3 (1CE3) (Ref. AMM TASK 27-94-34-400-001).
 2 If the resistance is more than 400 ohms:
_
 a Remove the relay (41CE3).
_
 b Do a check of the resistance of the relay between pin X1
_
 and X2.

 - If the resistance is more than 400 ohms:
 「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 A221
 Aug 01/05 CES

 - . replace the RELAY-SEC 3 ANN SPLY (41CE3) (Ref. IPC 27920803) . install the SEC3 (Ref. AMM TASK 27-94-34-400-001).

 - If the resistance is between 280 and 400 ohms: . do a check and repair the wiring of the RLY SEC FAULT signal from the relay to the SEC3 (Ref. ASM 27-92/05) . install the relay. . install the SEC3 (Ref. AMM TASK 27-94-34-400-001).
　
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