W DOC AIRBUS | TSM A320F

Incorrect Position of the THS for the SEC 1

TASK 27-40-00-810-803-A
Incorrect Position of the THS for the SEC 1

1. Possible Causes
  • RELAY-PITCH TRIM ACTUATOR MOTOR 2 SPLY [36CE2]
  • SEC-1 [1CE1]
  • electronic module N°2 of the pitch trim 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 SEC 1 (1CE1)
  • wiring from the relay (36CE2) to the ELAC 1 (2CE1)
  • wiring from the THS actuator pin B/M to the ground
  • wiring from the relay (36CE2) to the THS actuator (9CE)
  • wiring from the relay (36CE2) pin A/A2 to the C/B (19CE2)
  • wiring of the XDCR MON MOT 2 (V1, V2) signal
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
ASM 279412
AMM 27-94-34-000-001
Removal of the SEC
AMM 27-94-34-400-001
Installation of the SEC
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 27-40-00-700-054-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 SEC 1.
   (2) Do the BITE test of the EFCS (ground scanning) AMM 27-96-00-740-001.
4. Fault Isolation
Subtask 27-40-00-810-052-A
A. If the BITE test gives the maintenance message:
THS ACTR POS ERROR 9CE OF SEC1
   (1) Remove the RELAY-PITCH TRIM ACTUATOR MOTOR 2 SPLY [36CE2] AIPC 27920803.
   (2) Do a check of the resistance between pins X1 and X2.
     (a) If the resistance is less than 280 ohms:
     (b) If the resistance is more than 400 ohms:
  • Replace the RELAY-PITCH TRIM ACTUATOR MOTOR 2 SPLY [36CE2] .
     (c) If the resistance is between 280 and 400 ohms:
  • Install the RELAY-PITCH TRIM ACTUATOR MOTOR 2 SPLY [36CE2]
  • Go to para (3).
   (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:
   (8) If the fault continues:
  • Do a check of the wiring from the relay (36CE2), pin A/X2 to the ground ASM 279412.
  • 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 279412
  • 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.
     (a) If there is no continuity, repair the wiring.
     (b) If there is continuity:
  • Do a check of the wiring from the THS actuator pin B/M to the ground ASM 279412.
  • 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 279412.
       1 If there is no continuity, repair the wiring.
       2 If there is continuity:
  • Do a check of the wiring from the relay (36CE2) pin A/A2 to the C/B (19CE2) ASM 279412.
         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 2 (V1, V2) signal, from THS actuator (9CE) to the SEC 1 (1CE1) ASM 279412.
Subtask 27-40-00-700-055-A
B. Do the tests given in Para. 3.
[Rev.8 from Aug 2018] 2026.04.04 04:27:35 UTC
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