W DOC AIRBUS | TSM A320F

Failure of the SEC1

TASK 27-94-00-810-860-A
Failure of the SEC1

1. Possible Causes
  • RELAY-SEC 1 ANN SPLY [41CE1]
  • wiring of the RLY SEC FAULT signal from the relay to the SEC
  • SEC-1 [1CE1]
  • FCDC-1 [3CE1]
  • FCDC-2 [3CE2]
  • wiring of the DSI 4/3 (SEC 1 FAILED) signals
  • wiring of the + 28VDC signal
  • wiring of the 28VDC GND signal
  • wiring of the SEC1 ENGAGED (DSI 04) signal
  • wiring of the PLD ACTIVATION (DSI 01) signal
  • wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal
  • wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block
  • P/BSW-FLT CTL/SEC 1 (5CE1)
  • wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals
  • wiring of the PIN PROGRAM SEC1 (DSI 07) signal
  • wiring of the DGO 03 signal
  • wiring of the PIN PROGRAM SEC1 (DSI 32) signal
  • wiring of the PIN PROGRAM SEC1 (DSI 16) signal
  • wiring of the DSI 33 signal
  • wiring of the DSI 34 signal
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
ASM 279204
ASM 279205
AIPC 27920802
AIPC 27920803
ASM 279240
ASM 279253
AMM 27-94-00-710-002
Operational Test of the Spoiler Elevator Computer 1 (SEC 1)
AMM 27-94-34-000-001
Removal of the SEC
AMM 27-94-34-400-001
Installation of the SEC
ASM 279504
ASM 279505
AMM 27-95-34-000-001
Removal of the FCDC
AMM 27-95-34-400-001
Installation of the FCDC
AMM 27-96-00-740-001
BITE Test of the EFCS (Ground Scanning)
3. Fault Confirmation
Subtask 27-94-00-740-158-A
A. Test
   (1) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-94-00-810-132-C ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • Do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) On the SEC from standard 112, do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) On the SEC from standard 112, do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check and repair the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253.
Subtask 27-94-00-810-132-F ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • Do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505.
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) Do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) Do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 32) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 4_.
       4 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 16) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 5_.
       5 Do a check and repair the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253.
Subtask 27-94-00-810-132-G ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • Do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505.
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) Do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) Do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 32) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 4_.
       4 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 16) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 5_.
       5 Do a check of the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 6_.
       6 Do a check and repair the wiring of the DSI 33 signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
Subtask 27-94-00-810-132-L ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505.
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) Do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) Do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 32) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 4_.
       4 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 16) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 5_.
       5 Do a check of the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 6_.
       6 Do a check for an open circuit of the wiring of the DSI 33 signal from the SEC1 (1CE1) COM part and MON part:
         a For the COM part:
         b For the MON part:
Subtask 27-94-00-810-132-Q ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pins AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505.
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) On the SEC from standard 112, do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) On the SEC from standard 112, do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 16) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240.
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 4_.
       4 Do a check of the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 5_.
       5 Do a check of the wiring of the DSI 33 signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 6_.
       6 Do a check for an open circuit of the wiring of the DSI 34 signal from the SEC1 (1CE1) COM part and MON part:
         a For the COM part:
         b For the MON part:
Subtask 27-94-00-810-132-R ** ON A/C NOT FOR ALL
A. If the test confirms the fault:
  • do the operational test of the SEC1 AMM 27-94-00-710-002 to make sure that it does the servoing of its related surfaces.
   (1) If the flight controls move in relation to the SEC1 servoing:
     (a) Remove the SEC1 AMM 27-94-34-000-001.
     (b) At the SEC1 receptacle, do a check of the resistance between pin AB/12K and pin AE/12A ASM 279205.
       1 If the resistance is less than 280 ohms:
         a Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803.
         b Do a check of the resistance of the relay between pins X1 and X2.
       2 If the resistance is more than 400 ohms:
         a Remove the relay (41CE1).
         b Do a check of the resistance of the relay between pins X1 and X2.
  • If the resistance is more than 400 ohms:
    . replace the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
    . install the SEC1 AMM 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 SEC ASM 279205
    . install the relay
    . install the SEC1 AMM 27-94-34-400-001.
       3 If the resistance is between 280 and 400 ohms:
         a Install the SEC1 AMM 27-94-34-400-001.
         b Remove the FCDC-1 [3CE1] AMM 27-95-34-000-001.
         c If the fault continues:
         d If the fault continues:
  • Remove the RELAY-SEC 1 ANN SPLY [41CE1] AIPC 27920803
  • if the SEC1 FAULT warning message stays in view, install the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803 and go to Para. e_.
  • if the SEC1 FAULT warning message goes out of view, replace the RLY-SEC 1 ANN SPLY (41CE1) AIPC 27920803.
         e If the fault continues:
  • Do a check and repair the wiring of the DSI 4/3 (SEC 1 FAILED) signals from the FCDC1 (3CE1) and the FCDC2 (3CE2) to the RLY-SEC 1 ANN SPLY (41CE1) ASM 279504 and ASM 279505.
   (2) If the flight controls do not move in relation to the SEC servoing:
     (a) Do a check of the wiring of the + 28VDC signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (b).
     (b) Do a check of the wiring of the 28VDC GND signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (c).
     (c) Do a check of the wiring of the SEC1 ENGAGED (DSI 04) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (d).
     (d) Do a check of the wiring of the PLD ACTIVATION (DSI 01) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (e).
     (e) Do a check of the wiring of the REVERSE LOCK AUTHORIZATION (DSI 02) signal from the SEC1 (1CE1) COM part and MON part to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (f).
     (f) Do a check of the wiring from the pushbutton switch (5CE1), pin A/C1 and pin A/C3 to the first terminal block ASM 279204:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. (g).
     (g) Replace the P/BSW-FLT CTL/SEC 1 (5CE1) AIPC 27920802.
     (h) If the fault continues:
       1 Do a check of the wiring of the SEC DISCONNECTED IN THE RACK (DSI 12 and DSI 28) signals from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 2_.
       2 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 07) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 3_.
       3 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 32) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 4_.
       4 Do a check of the wiring of the PIN PROGRAM SEC1 (DSI 16) signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 5_.
       5 Do a check of the wiring of the DGO 03 signal from the SEC1 (1CE1) COM part to MON part and MON part to COM part ASM 279253:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 6_.
       6 Do a check of the wiring of the DSI 33 signal from the SEC1 (1CE1) COM part and MON part to the ground terminal ASM 279240:
  • if there is no continuity, repair the above wiring
  • if there is continuity, go to Para. 7_.
       7 Do a check for an open circuit of the wiring of the DSI 34 signal from the SEC1 (1CE1) COM part and MON part:
         a For the COM part:
         b For the MON part:
Subtask 27-94-00-740-159-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:28:16 UTC
"WTRUIB" 2025