W DOC AIRBUS | TSM A320F

Incorrect Position of the THS for the ELAC 1

TASK 27-93-00-810-844-A
Incorrect Position of the THS for the ELAC 1

1. Possible Causes
  • ELAC-1 [2CE1]
  • command position transducer of the THS actuator
  • monitor position transducer of the THS actuator
  • wiring from the relay (36CE2) pin A/X2 to the ground
  • wiring from the relay (36CE2) to the ELAC 1 (2CE1)
  • wiring from the relay (36CE2) to the SEC 1 (1CE1)
  • wiring from the THS actuator (9CE) pin B/M to the ground
  • wiring from the relay (36CE2) to the THS actuator (9CE)
  • wiring from the relay (36CE2) A/A2 to the C/B (19CE2)
  • wiring from the XDCR MON MOT 2 (V1, V2) signal
  • wiring from the XDCR COM MOT 2 (V1, V2) signal
  • electronic module N°2 of the picth trim actuator
  • RELAY-PITCH TRIM ACTUATOR MOTOR 2 SPLY [36CE2]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 27-44-56-000-001
Removal of the Position Transducer from the THS Actuator
AMM 27-44-56-400-001
Installation of the Position Transducer to the THS Actuator
AMM 27-44-57-000-001
Removal of the Pitch Trim Actuator from the THS Actuator
AMM 27-44-57-000-002
Removal of the Electronic Modules of the Pitch Trim Actuator
AMM 27-44-57-400-001
Installation of the Pitch Trim Actuator to the THS Actuator
AMM 27-44-57-400-002
Installation of the Electronic Modules of the Pitch Trim Actuator
AIPC 27920803
ASM 279312
AMM 27-93-34-000-001
Removal of the ELAC
AMM 27-93-34-400-001
Installation of the ELAC
AMM 27-96-00-710-022
Operational Test of the THS Actuator Electrical Control (Activation for BITE Test)
AMM 27-96-00-740-001
BITE Test of the EFCS (Ground Scanning)
3. Fault Confirmation
Subtask 27-93-00-700-100-A
A. Test
   (1) Do the operational test of the THS actuator electrical control AMM 27-96-00-710-022.
NOTE: Do the ground setting only with the ELAC 1.
   (2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-93-00-810-093-A
A. If the BITE test gives the maintenance message:
THS ACTR POS ERROR 9CE OF ELAC1
And the Post Flight Report (PFR) shows the maintenance message:
ELAC1 MON OR WIRING FROM THS ACTR XDCR2 9CE
   (1) Replace the ELAC-1 [2CE1] , AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
   (2) Replace the command position transducer of the THS actuator , AMM 27-44-56-000-001 and AMM 27-44-56-400-001.
   (3) If the fault continues:
   (4) If the fault continues :
  • Do a check of the wiring from the relay (36CE2) pin A/X2 to the ground ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the ELAC 1 (2CE1), from the pin A/X1 to the pin AD/15J ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the SEC 1 (1CE1), from the pin A/X1 to the pin AE/13E ASM 279312.
     (a) If there is no continuity, repair the wiring.
     (b) If there is continuity :
  • Do a check of the wiring from the THS actuator (9CE) pin B/M to the ground, ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the THS actuator (9CE) from the pin A/A1 to the pin B/K ASM 279312.
       1 If there is no continuity, repair the wiring.
       2 If there is continuity :
  • Do a check of the wiring from the relay (36CE2) A/A2 to the C/B (19CE2) ASM 279312.
         a If there is no continuity, repair the wiring.
         b If there is continuity :
  • Do a check and repair the wiring from the XDCR MON MOT 2 (V1, V2) signal, of the THS actuator (9CE) to the ELAC 1 (2CE1) ASM 279312.
  • Do a check and repair the wiring from the XDCR COM MOT 2 (V1, V2) signal, of the THS actuator (9CE) to the ELAC 1 (2CE1) ASM 279312.
Subtask 27-93-00-810-246-A
B. If the BITE test gives the maintenance message:
THS ACTR POS ERROR 9CE OF ELAC1
And the Post Flight Report (PFR) does not show the maintenance message:
ELAC1 MON OR WIRING FROM THS ACTR XDCR2 9CE
   (1) Replace the ELAC-1 [2CE1] , AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
   (2) If the fault continues:
   (3) If the fault continues:
   (4) If the fault continues:
   (5) If the fault continues:
   (6) If the fault continues :
   (7) If the fault continues :
  • Do a check of the wiring from the relay (36CE2) pin A/X2 to the ground ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the ELAC 1 (2CE1), from the pin A/X1 to the pin AD/15J ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the SEC 1 (1CE1), from the pin A/X1 to the pin AE/13E ASM 279312.
     (a) If there is no continuity, repair the wiring.
     (b) If there is continuity :
  • Do a check of the wiring from the THS actuator (9CE) pin B/M to the ground, ASM 279312.
  • Do a check of the wiring from the relay (36CE2) to the THS actuator (9CE) from the pin A/A1 to the pin B/K ASM 279312.
       1 If there is no continuity, repair the wiring.
       2 If there is continuity :
  • Do a check of the wiring from the relay (36CE2) A/A2 to the C/B (19CE2) ASM 279312.
         a If there is no continuity, repair the wiring.
         b If there is continuity :
  • Do a check and repair the wiring from the XDCR MON MOT 2 (V1, V2) signal, of the THS actuator (9CE) to the ELAC 1 (2CE1) ASM 279312.
  • Do a check and repair the wiring from the XDCR COM MOT 2 (V1, V2) signal, of the THS actuator (9CE) to the ELAC 1 (2CE1) ASM 279312.
Subtask 27-93-00-700-101-A
C. Do the tests given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:27:58 UTC
"WTRUIB" 2025