W DOC AIRBUS | TSM A320F

Loss of the Signal of the Left Blue Elevator-Servocontrol Servovalve by the ELAC 1

TASK 27-93-00-810-861-A
Loss of the Signal of the Left Blue Elevator-Servocontrol Servovalve by the ELAC 1

1. Possible Causes
  • servovalve
  • ELAC-1 [2CE1]
  • XDCR UNIT-ELEV POS, L [49CE1]
  • SERVO CTL-L ELEVATOR, OUTBD B [34CE3]
  • wiring of the POS XDCR (LVDT) (ANI 3-1) signal from the ELAC 1 (2CE1) to the first terminal block
  • wiring of the POS XDCR MON (RVDT) (ANI 2-1) signal from the transducer unit (49CE1) to the ELAC 1 (2CE1)
  • wiring of the POS XDCR COM (RVDT) (ANI 2-1) signal from the ELAC 1 (2CE1) to the first terminal block
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
TSM TASK 31-32-00-810-933-A
Failure of the Analog Links
AMM 27-34-51-000-001
Removal of the Elevator Servo Control
AMM 27-34-51-000-008
Removal of the Elevator Servo Control Actuator Servo Valve
AMM 27-34-51-400-001
Installation of the Elevator Servo Control
AMM 27-34-51-400-003
Installation of the Elevator Servo Control Actuator Servo Valve
AMM 27-92-13-000-001
Removal of the Elevator Position Transducer-Unit
AMM 27-92-13-400-001
Installation of the Elevator Position Transducer-Unit
ASM 279307
AMM 27-93-34-000-001
Removal of the ELAC
AMM 27-93-34-400-001
Installation of the ELAC
ASM 279407
AMM 27-96-00-710-020
Operational Test of the Side Stick Assembly (Activation for the BITE Test)
AMM 27-96-00-740-001
BITE Test of the EFCS (Ground Scanning)
3. Fault Confirmation
Subtask 27-93-00-700-110-A
A. Test
   (1) Do the operational test of the side stick assembly (activation for the BITE test) AMM 27-96-00-710-020.
   (2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-93-00-810-110-C
A. If the test gives the maintenance message:
ELAC1 MON OR WIRING TO L B ELEV SERVO VLV 34CE3
   (1) If the fault continues:
     (a) Replace the servovalve AMM 27-34-51-000-008 and AMM 27-34-51-400-003.
   (2) If the fault continues:
     (a) Replace the ELAC-1 [2CE1] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
   (3) If the fault continues:
     (a) Replace the XDCR UNIT-ELEV POS, L [49CE1] AMM 27-92-13-000-001 and AMM 27-92-13-400-001.
   (4) If the fault continues:
     (a) Replace the SERVO CTL-L ELEVATOR, OUTBD B [34CE3] AMM 27-34-51-000-001 and AMM 27-34-51-400-001
   (5) If the fault continues:
     (a) Do a check of the wiring of the POS XDCR (LVDT) (ANI 3-1) signal from the ELAC 1 (2CE1) to the first terminal block ASM 279307.
  • If there is continuity, go to Para. (b)
  • If there is no continuity, repair the above wiring.
     (b) Do a check of the wiring of the POS XDCR MON (RVDT) (ANI 2-1) signal from the transducer unit (49CE1) to the ELAC 1 (2CE1) ASM 279307.
  • If there is continuity, go to Para. (c)
  • If there is no continuity, repair the above wiring.
     (c) Do a check and repair the wiring of the POS XDCR COM (RVDT) (ANI 2-1) signal from the ELAC 1 (2CE1) to the first terminal block ASM 279307.
Subtask 27-93-00-700-111-A
B. Do the test given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:27:59 UTC
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