W DOC AIRBUS | TSM A320F

Incorrect Position of the THS for ELAC2

TASK 27-93-00-810-836-A
Incorrect Position of the THS for ELAC2

1. Possible Causes
  • ACTUATOR-THS [9CE]
  • electrical load sensing-device
  • ELAC-2 [2CE2]
  • electronic module N°1 of the pitch trim actuator
  • monitor position transducer of the THS actuator
  • command position transducer of the THS actuator
  • RELAY - ELAC2 SPLY [53CE]
  • RELAY-PITCH TRIM ACTUATOR MOTOR 1 SPLY [36CE1]
  • wiring from the relay (36CE1) pin A/X2 to the ground
  • wiring from the relay (36CE1) to the ELAC 2 (2CE2)
  • wiring from the THS actuator (9CE) pin D/E to the ground
  • wiring from the relay (36CE1) to the THS actuator (9CE)
  • wiring from the relay (36CE1) to the relay (53CE)
  • wiring from the relay (53CE) pin A/B3 to the C/B (19CE1)
  • wiring of the XDCR MON MOT 1 (V1, V2) signal
  • wiring of the XDCR COM MOT 1 (V1, V2) signal
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 27-44-51-000-001
Removal of the Trimmable Horizontal Stabilizer (THS) Actuator
AMM 27-44-51-000-802
Removal of the Electrical Load Sensing Device
AMM 27-44-51-220-004
Detailed Inspection of THSA Upper Attachments for Secondary Load Path Loading
AMM 27-44-51-400-001
Installation of the Trimmable Horizontal Stabilizer (THS) Actuator
AMM 27-44-51-400-802
Installation of the Electrical Load Sensing Device
AMM 27-44-51-710-802
Operational Check of THS Actuator Electrical Load Sensing Device
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 279313
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 27-93-00-810-285-A ** ON A/C NOT FOR ALL
A. Inspection
   (1) Do a detailed inspection of the THSA upper attachments AMM 27-44-51-220-004.
     (a) If the inspection is not satisfactory:
     (b) If the inspection is satisfactory:
       1 If the operational check is not satisfactory:
       2 If the operational check is satisfactory, continue the trouble shooting procedure.
Subtask 27-93-00-700-084-A
B. Test
   (1) Do the operational test of the THS-actuator electrical control AMM 27-96-00-710-022.
NOTE: It is necessary to do the ground setting only with ELAC2.
   (2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-93-00-810-085-B
A. If the BITE test gives the maintenance message:
THS ACTR POS ERROR 9CE OF ELAC2
   (1) If the fault continues:
   (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 (36CE1) pin A/X2 to the ground, ASM 279313.
  • Do a check of the wiring from the relay (36CE1) to the ELAC 2 (2CE2), from the pin A/X1 to the pin AD/15J ASM 279313.
     (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 D/E to the ground, ASM 279313.
  • Do a check of the wiring from the relay (36CE1) to the THS actuator (9CE) from the pin A/A1 to the pin D/F ASM 279313.
       1 If there is no continuity, repair the wiring.
       2 If there is continuity :
  • Do a check of the wiring from the relay (36CE1) to the relay (53CE) from the pin A/A2 to the pin A/B2 ASM 279313.
  • Do a check of the wiring from the relay (53CE) pin A/B3 to the C/B (19CE1) ASM 279313.
         a If there is no continuity, repair the wiring.
         b If there is continuity :
  • Do a check and repair the wiring of the XDCR MON MOT 1 (V1, V2) signal, from the THS actuator (9CE) to the ELAC 2 (2CE2) ASM 279313.
  • Do a check and repair the wiring of the XDCR COM MOT 1 (V1, V2) signal, from the THS actuator (9CE) to the ELAC 2 (2CE2) ASM 279313.
Subtask 27-93-00-700-085-A ** ON A/C NOT FOR ALL
B. Do the tests given in Para. 3.
Subtask 27-93-00-700-085-B ** ON A/C NOT FOR ALL
B. Do the tests given in Para. 3.B.
[Rev.8 from Aug 2018] 2026.04.04 04:27:57 UTC
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