W DOC AIRBUS | AMM A320F

Electrical Test of the Elevator Servo Controls

TASK 27-34-00-760-001-A
Electrical Test of the Elevator Servo Controls

WARNING: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND THE RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.
WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:
  • ON THE THS OR IN THE REAR FUSELAGE
  • ON TOP OF THE WINGS OR PYLONS.
WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.
ZONE: 334
ZONE: 344
1. Reason for the Job
To confirm the cause of an elevator servocontrol fault (flight control computer, aircraft wiring or servocontrol).
In this procedure, you will interchange the wiring between two servocontrols (the one that you think is unserviceable and one that you know is serviceable).
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
3
WARNING NOTICE(S)
99D27303500000
1
SWITCH SERV. CTL ELEV
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
334
THS TRAILING EDGE
344
THS TRAILING EDGE
334DB, 344DB
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 27-96-00-710-020-A
Operational Test of the Side Stick Assembly (Activation for the BITE Test)
TASK 27-96-00-740-001-A
BITE Test of the EFCS (Ground Scanning)
TASK 29-10-00-864-001-A
Depressurize the Green Hydraulic System
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
TASK 29-10-00-864-003-A
Depressurize the Blue Hydraulic System
TASK 55-13-11-000-001-A
Remove/Open of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels
TASK 55-13-11-400-001-A
Install/Close of the Trimmable Horizontal Stabilizer (THS) Trailing-Edge Access-Panels
3. Job Set-up
Subtask 27-34-00-860-079-A
A. Aircraft Maintenance Configuration
   (1) Depressurize the aircraft hydraulic systems
(Ref. AMM TASK 29-10-00-864-001) (Ref. AMM TASK 29-10-00-864-002) (Ref. AMM TASK 29-10-00-864-003).
Subtask 27-34-00-865-065-A
B. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B11
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B10
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B09
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B08
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B06
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B05
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B03
** ON A/C ALL
105VUFLIGHT CONTROLS/ELAC2/STBY SPLY16CE2A02
105VUFLT CTL/ELAC1/STBY SPLY16CE1A01
105VUFLT CTL/SEC1/STBY SPLY22CEB01
121VUFLIGHT CONTROLS/FCDC2/SPLY20CE2Q20
121VUFLIGHT CONTROLS/SEC3/SPLY21CE3Q19
121VUFLIGHT CONTROLS/SEC2/SPLY21CE2Q18
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
121VUFLIGHT CONTROLS/ELAC2/NORM/SPLY15CE2R20
Subtask 27-34-00-941-070-A
C. Safety Precautions
   (1) Put a WARNING NOTICE(S) in position to tell persons not to use these controls:
  • The CAPT and F/O side sticks
  • The pitch trim control-wheels.
   (2) Put WARNING NOTICES in position to tell persons not to operate the hydraulic systems.
Subtask 27-34-00-010-069-A
D. Get Access
   (1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position at zone 334 and zone 344.
   (2) Open the trailing edge access-panels 334DB and 344DB (Ref. AMM TASK 55-13-11-000-001).
Subtask 27-34-00-480-062-A
E. Installation of the Tool
   (1) If the fault is on the servocontrol:
     (a) For 34CE1 or 34CE2:
  • Disconnect the electrical connectors 34CE1-A, 34CE1-B, 34CE1-C, 49CE1, 34CE2-A, 34CE2-B, 34CE2-C and 49CE2.
     (b) For 34CE3 or 34CE4:
  • Disconnect the electrical connectors 34CE3-A, 34CE3-B, 34CE3-C, 49CE1, 34CE4-A, 34CE4-B, 34CE4-C and 49CE2.
   (2) Connect the 99D27303500000 SWITCH SERV. CTL ELEV to the disconnected electrical connectors.
Subtask 27-34-00-865-066-A
F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B11
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B10
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B09
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B08
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B06
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B05
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B03
** ON A/C ALL
105VUFLIGHT CONTROLS/ELAC2/STBY SPLY16CE2A02
105VUFLT CTL/ELAC1/STBY SPLY16CE1A01
105VUFLT CTL/SEC1/STBY SPLY22CEB01
121VUFLIGHT CONTROLS/FCDC2/SPLY20CE2Q20
121VUFLIGHT CONTROLS/SEC3/SPLY21CE3Q19
121VUFLIGHT CONTROLS/SEC2/SPLY21CE2Q18
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
121VUFLIGHT CONTROLS/ELAC2/NORM/SPLY15CE2R20
4. Procedure
Subtask 27-34-00-760-050-A
A. Electrical Test of the Elevator Servo Controls
   (1) Do the operational test of the side stick assembly (Activation for the BITE test) (Ref. AMM TASK 27-96-00-710-020).
   (2) Do a BITE Test of the EFCS (Ground Scanning) (Ref. AMM TASK 27-96-00-740-001):
     (a) If the fault is the same, do a check of the aircraft wiring and of the flight control computer (Ref. TSM).
     (b) If the fault is on the other side, replace the defective servocontrol.
5. Close-up
Subtask 27-34-00-865-067-A
A. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B11
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B10
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B09
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B08
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B06
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B05
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B03
** ON A/C ALL
105VUFLIGHT CONTROLS/ELAC2/STBY SPLY16CE2A02
105VUFLT CTL/ELAC1/STBY SPLY16CE1A01
105VUFLT CTL/SEC1/STBY SPLY22CEB01
121VUFLIGHT CONTROLS/FCDC2/SPLY20CE2Q20
121VUFLIGHT CONTROLS/SEC3/SPLY21CE3Q19
121VUFLIGHT CONTROLS/SEC2/SPLY21CE2Q18
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
121VUFLIGHT CONTROLS/ELAC2/NORM/SPLY15CE2R20
Subtask 27-34-00-080-056-A
B. Removal of the Tool
   (1) Disconnect the 99D27303500000 SWITCH SERV. CTL ELEV.
   (2) Connect these electrical connectors:
     (a) For the servocontrol 34CE1 or 34CE2:
  • 34CE1-A, 34CE1-B, 34CE1-C, 49CE1, 34CE2-A, 34CE3-B, 34CE4-C and 49CE2.
     (b) For the servocontrol 34CE3 or 34CE4:
  • 34CE3-A, 34CE3-B, 34CE3-C, 49CE1, 34CE4-A, 34CE4-B, 34CE4-C and 49CE2.
Subtask 27-34-00-865-068-A
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B11
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B10
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B09
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B08
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B06
49VUFLIGHT CONTROLS/FCDC1/SPLY20CE1B05
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
49VUFLIGHT CONTROLS/SEC1/NORM/SPLY21CE1B03
** ON A/C ALL
105VUFLIGHT CONTROLS/ELAC2/STBY SPLY16CE2A02
105VUFLT CTL/ELAC1/STBY SPLY16CE1A01
105VUFLT CTL/SEC1/STBY SPLY22CEB01
121VUFLIGHT CONTROLS/FCDC2/SPLY20CE2Q20
121VUFLIGHT CONTROLS/SEC3/SPLY21CE3Q19
121VUFLIGHT CONTROLS/SEC2/SPLY21CE2Q18
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
121VUFLIGHT CONTROLS/ELAC2/NORM/SPLY15CE2R20
Subtask 27-34-00-410-067-A
D. Close Access
   (1) Make sure that the work area is clean and clear of tools and other items.
   (2) Close the trailing edge access-panels 334DB and 344DB (Ref. AMM TASK 55-13-11-400-001).
Subtask 27-34-00-942-075-A
E. Put the aircraft back to its initial configuration.
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the access platform(s).
[Rev.10 from 2021] 2026.03.31 23:50:09 UTC
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