W DOC AIRBUS | TSM A320F

Wrong Aileron Position Indication

TASK 27-10-00-810-836-A
Wrong Aileron Position Indication

1. Possible Causes
  • ELAC-1 [2CE1]
  • SERVO CTL-L AILERON, OUTBD B [33CE3]
  • wiring of the LVDT POS Signal
  • ELAC-2 [2CE2]
  • SERVO CTL-L AILERON, INBD G [33CE1]
  • SERVO CTL-R AILERON, INBD G [33CE2]
  • SERVO CTL-R AILERON, OUTBD B [33CE4]
2. Job Set-up Information
 A. Referenced Information
REFERENCE
DESIGNATION
AMM 24-41-00-861-002
Energize the Aircraft Electrical Circuits from the External Power
AMM 27-14-00-220-001
Check Aileron Servo Controls and Hinge Bearings for Excessive Play and Condition
AMM 27-14-00-820-001
Adjustment of the Aileron
AMM 27-14-51-000-001
Removal of the Aileron Servo Control
AMM 27-14-51-400-001
Installation of the Aileron Servo Control
ASM 279302
ASM 279303
AMM 27-93-34-000-001
Removal of the ELAC
AMM 27-93-34-400-001
Installation of the ELAC
AMM 29-10-00-863-003
Pressurize the Blue Hydraulic System with a Hydraulic Ground Power-Cart
AMM 29-10-00-864-003
Depressurize the Blue Hydraulic System
AMM 29-23-00-863-001
Pressurize the Green Hydraulic System from the Yellow Hydraulic System through the PTU with the Electric Pump
AMM 29-23-00-864-001
Depressurize the Green and Yellow Hydraulic Systems after Operation of the PTU
AMM 31-60-00-860-001
EIS Start Procedure
AMM 31-60-00-860-002
EIS Stop Procedure
3. Fault Confirmation
Subtask 27-10-00-860-102-A
A. Job Set-up
   (1) Energize the aircraft electrical circuits
AMM 24-41-00-861-002.
   (2) On the panel 23VU, make sure that the FLT CTL/ELAC 1 pushbutton switch is pushed (on this pushbutton switch, the OFF and FAULT legends are off).
   (3) On the panel 24VU, make sure that the FLT CTL/ELAC 2 pushbutton switch is pushed (on this pushbutton switch, the OFF and FAULT legends are off).
   (4) On the center pedestal, make sure that the slats and flaps control lever is in the 0 position.
   (5) Make sure that the two side stick controllers are in the neutral position.
   (6) Do the EIS start procedure (Upper ECAM DU and lower ECAM DU only)
AMM 31-60-00-860-001.
   (7) Pressurize the Green and Blue hydraulic systems AMM 29-23-00-863-001 and AMM 29-10-00-863-003.
Subtask 27-10-00-710-050-A
B. Test
   (1) Do the test that follows to confirm the fault:
ACTION
RESULT
1. On the overhead panel 24VU:
  • Release the FLT CTL/ELAC 2 pushbutton switch.
On the overhead panel 24VU:
  • The OFF legend of the FLT CTL/ELAC 2 pushbutton switch comes on.
2. On the center pedestal, on the ECAM control panel:
  • Push the F/CTL pushbutton switch
On the lower ECAM display unit:
  • The F/CTL page comes into view.

  • The indexes of the left and right ailerons show the neutral position.
3. On the CAPT or F/O side:
  • Move the side stick to the right until it touches the stop.
On the lower ECAM display unit:
  • The index of the right aileron moves to the upper mark on the scale
  • The index of the left aileron moves to the lower mark on the scale.
  • Release the side stick.
  • The indexes of the left and right ailerons move to the neutral position.
  • Move the side stick to the left until it touches the stop.
  • The index of the left aileron moves to the upper mark on the scale
  • The index of the right aileron moves to the lower mark on the scale.
  • Release the side stick.
  • The indexes of the left and right ailerons move to the neutral position.
4. On the overhead panel 24VU:
  • Push the FLT CTL/ELAC 2 pushbutton switch.
On the overhead panel 24VU:
  • The OFF legend of the FLT CTL/ELAC 2 pushbutton switch goes off.
5. On the overhead panel 23VU:
  • Releasee FLT CTL/ELAC 1 pushbutton switch.
On the overhead panel 23VU:
  • The OFF legend of the FLT CTL/ELAC 1 pushbutton switch comes on.
6. On the CAPT or F/O side:
  • Move the side stick to the right until it touches the stop.
  • The index of the right aileron moves to the upper mark on the scale
  • The index of the left aileron moves to the lower mark on the scale.
  • Release the side stick.
  • The indexes of the left and right ailerons go back to the neutral position.
  • Move the side stick to the left until it touches the stop.
  • The index of the left aileron moves to the upper mark on the scale
  • The index of the right aileron moves to the lower mark on the scale.
  • Release the side stick.
  • The indexes of the left and right ailerons go back to the neutral position.
7. On the overhead panel 23VU:
  • Push the FLT CTL/ELAC 1 pushbutton switch.
On the overhead panel 23VU:
  • The OFF legend of the FLT CTL/ELAC1 pushbutton switch goes off.
8.Depressurize the green and blue hydraulic systems AMM 29-23-00-864-001 AMM 29-10-00-864-003.
9.Do the EIS stop procedure AMM 31-60-00-860-002.
4. Fault Isolation
Subtask 27-10-00-810-084-A
A. If the test confirms the fault for the left aileron:
   (1) For the two servo controls of the left aileron:
  • Do the check of the aileron servo controls and hinge bearings for excessive play and condition AMM 27-14-00-220-001.
   (2) Do the adjustment of the left aileron AMM 27-14-00-820-001.
   (3) If the fault continues:
     (a) If the aileron position is not correct with the ELAC1 ON and ELAC2 OFF:
       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:
  • Do a check and repair the wiring of the LVDT POS Signal from the servocontrol (33CE3) to the ELAC 1 (2CE1) COM and MON parts ASM 279302.
     (b) If the aileron position is not correct with the ELAC2 ON and ELAC1 OFF:
       1 Replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
       2 If the fault continues:
       3 If the fault continues:
  • Do a check and repair the wiring of the LVDT POS Signal from the servocontrol (33CE1) to the ELAC 2 (2CE2) COM and MON parts ASM 279303.
Subtask 27-10-00-810-085-A
B. If the test confirms the fault for the right aileron:
   (1) For the two servo controls of the right aileron:
  • Do the check of the aileron servo controls and hinge bearings for excessive play and condition AMM 27-14-00-220-001.
   (2) Do the adjustment of the right aileron AMM 27-14-00-820-001.
   (3) If the fault continues:
     (a) If the aileron position is not correct whith the ELAC1 ON and ELAC2 OFF:
       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:
  • Do a check and repair the wiring of the LVDT POS Signal from the servocontrol (33CE2) to the ELAC 1 (2CE2) COM and MON parts ASM 279302.
     (b) If the aileron position is not correct whith the ELAC2 ON and ELAC1 OFF:
       1 Replace the ELAC-2 [2CE2] AMM 27-93-34-000-001 and AMM 27-93-34-400-001.
       2 If the fault continues:
       3 If the fault continues:
  • Do a check and repair the wiring of the LVDT POS Signal from the servocontrol (33CE4) to the ELAC 2 (2CE2) COM and MON parts ASM 279303.
5. Close-up
Subtask 27-10-00-710-051-A
A. Do the test given in Para.3.
[Rev.8 from Aug 2018] 2026.04.04 04:27:28 UTC
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