W DOC AIRBUS | AMM A320F

Removal of the THS Actuator Motor

TASK 27-44-53-000-001-A
Removal of the THS Actuator Motor

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.
ZONE: 310
1. Reason for the Job
Self explanatory
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
1
CAP - BLANKING
No specific
1
PLUG - BLANKING
No specific
AR
SAFETY CLIP - CIRCUIT BREAKER
No specific
AR
WARNING NOTICE(S)
 B. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
310
FUSLG TAIL SECTION AFT OF AFT PRESS BHD
312AR
 C. Referenced Information
REFERENCE
DESIGNATION
TASK 29-00-00-864-001-A
Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A
Safety Procedures of the Hydraulic System
TASK 29-10-00-864-002-A
Depressurize the Yellow Hydraulic System
F THS Actuator Motor
3. Job Set-up
Subtask 27-44-53-010-050-A
A. Get Access
   (1) Open the access door 312AR.
   (2) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position.
Subtask 27-44-53-865-050-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/THS/ACTR/MOT219CE2B09
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/ELAC1/NORM/SPLY15CE1B06
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
** ON A/C ALL
105VUFLT CTL/ELAC1/STBY SPLY16CE1A01
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
Subtask 27-44-53-860-050-A
C. Aircraft Maintenance Configuration
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: OBEY THE HYDRAULIC SAFETY PROCEDURES.
   (1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
   (2) Put the WARNING NOTICE(S) in the flight compartment to tell persons not to operate the pitch controls.
   (3) Make sure that the Green and Yellow hydraulic systems are depressurized and put them in the maintenance configuration (Ref. AMM TASK 29-00-00-864-001).
   (4) Make sure that the Blue hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
   (5) Depressurize the reservoirs of the Green and Yellow hydraulic systems.
(Ref. AMM TASK 29-10-00-864-002).
   (6) Put the WARNING NOTICE(S) in position to tell persons not to pressurize the Green, the Yellow and the Blue hydraulic systems:
  • in the cockpit on the hydraulic section 40VU of the overhead panel,
  • on the ground service panel of the Green, the Yellow and the Blue hydraulic systems.
4. Procedure
Subtask 27-44-53-020-050-A
A. Removal of the THS Actuator Motor
F THS Actuator Motor
NOTE: The two THS actuator motors (2) are the same. The removal of one of the motors (2) only is given.
   (1) Remove the THS actuator motor (2) from the THS casing as follows:
     (a) Remove the screws (7) and the washers (8) from the motor (2).
     (b) Remove the motor (2) from the splined shaft (20).
NOTE: Carefully disengage the motor (2) from the spacer tube assemblies (3),(4),(5).
   (2) Remove the spacer tube assembly (4) from the THS casing as follows:
     (a) Disengage the spacer tube assembly (4) from the valve block unit (6).
     (b) Remove and discard the O-rings (14) from the spacer tube (15).
   (3) Remove the spacer tube assembly (5) from the THS casing as follows:
     (a) Remove the expansion plug (18) from the spacer tube (19).
     (b) Disengage the spacer tube (19) from the valve block unit (6).
     (c) Remove and discard the back-up rings (16) and the O-rings (17) from the ends of the spacer tube (19).
   (4) Remove the spacer tube assembly (3) from the THS casing as follows:
     (a) Remove the expansion plug (12) from the spacer tube (13).
     (b) Disengage the spacer tube (13) from the valve block unit (6).
     (c) Remove and discard the back-up rings (10) and the O-rings (11) from the ends of the spacer tube (13).
   (5) Put a PLUG - BLANKING in each open port of the valve block unit (6).
   (6) Put a CAP - BLANKING on each end of the spacer tubes (13),(15),(19).
[Rev.10 from 2021] 2026.03.31 23:51:40 UTC
"Aviabrain" 2025