W DOC AIRBUS | AMM A320F

Installation of the Trimmable Horizontal Stabilizer (THS) Leading Edge

TASK 55-12-11-400-001-A
Installation of the Trimmable Horizontal Stabilizer (THS) Leading Edge

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: 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: 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: 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.
WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.
WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
WARNING: DO NOT GET THE FLUID ON YOUR SKIN OR IN YOUR EYES. IF YOU DO:
  • FLUSH IT AWAY WITH CLEAN WATER
  • GET MEDICAL AID.
CAUTION: DO NOT CAUSE DAMAGE TO THE SURFACES. THE COMPONENTS ARE MADE OF CARBONFIBER REINFORCED PLASTIC.
ZONE: 331
ZONE: 341
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
AR
SCRAPER - NON METALLIC
98D27903500000
2
PIN-SIDE STICK LOCKING
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.06AAB1)
Polysulfide Sealant-General Purpose Fillet -
(Material No.06AAC1)
Polysulfide Sealant-General Purpose Interfay -
(Material No.06AEA1)
Polysulfide Sealant-Low Adhesion Brushable -
(Material No.08BAA9)
Non Aqueous Cleaner-General - -
(Material No.08BBC1)
Non Aqueous Cleaner-- Naphta based and Alcohol -
(Material No.14DBB1)
Release Agent-- Liquid Wax -
(Material No.14DCB1)
Release Agent-- Solvant Base -
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
331
THS LEADING EDGE
341
THS LEADING EDGE
 D. Referenced Information
REFERENCE
DESIGNATION
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
F Trimmable Horizontal Stabilizer Leading-Edge
F Trimmable Horizontal Stabilizer Leading Edge Left Hand
3. Job Set-up
Subtask 55-12-11-860-054-A
A. Aircraft Maintenance Configuration
   (1) Make sure that the hydraulic systems are depressurized (Ref. AMM TASK 29-10-00-864-001), (Ref. AMM TASK 29-10-00-864-002), (Ref. AMM TASK 29-10-00-864-003).
   (2) Make sure that the 98D27903500000 PIN-SIDE STICK LOCKING is in the CAPT and F/O side sick controllers.
   (3) Make sure that the warning notices are in the flight compartment to tell persons not to operate the flight controls.
   (4) Make sure that the warning notices are in position to tell persons not to operate the hydraulic systems.
   (5) Make sure that the access platforms are in position at zone 330 and/or 340.
Subtask 55-12-11-865-060-A
B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B09
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
** ON A/C ALL
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
4. Procedure
NOTE: Only the installation of the LH leading edge is shown. The installation of the RH leading edge is the same.
Subtask 55-12-11-560-050-B
A. Prepare the components for installation:
   (1) Make sure that the rubber strip (7) is in good condition.

NOTE: If necessary, replace the rubber strip (7).
   (2) Make sure that the anchor nuts are in good condition.
   (3) Remove the old sealant from the mating surfaces of the leading edge sections, the ribs and the spar box upper and lower shells. Use a SCRAPER - NON METALLIC and Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
Subtask 55-12-11-420-050-B ** ON A/C NOT FOR ALL
B. Install the leading edge intersection (1).
   (1) Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the mating surfaces along the leading edge rib 1 and the spar box upper and lower shell.
   (2) Apply Release Agent-- Liquid Wax - (Material No.14DBB1) to the mating surfaces of the leading edge intersection (1).
   (3) Put the leading edge intersection (1) in position.
   (4) Make sure that the rubber strip (7) touches the fuselage skin.
   (5) Install and tighten the screws (4).
Subtask 55-12-11-420-051-A ** ON A/C NOT FOR ALL
C. Install the inboard and outboard leading edge sections (2) and (3).
   (1) Apply Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the mating surfaces along the leading edge ribs and the spar box upper and lower shells.
   (2) Apply Release Agent-- Liquid Wax - (Material No.14DBB1) to the mating surfaces of the leading edge sections (2) and (3).
   (3) Put the leading edge sections (2) and (3) in position.
   (4) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) to the screws (5) and (6).
   (5) Install the screws (4), (5) and (6). Do not tight the screws at this time.
   (6) Let the sealant cure
   (7) Tighten the screws (4), (5) and (6).
Subtask 55-12-11-914-051-A ** ON A/C NOT FOR ALL
D. Sealing
   (1) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the gap around each leading edge section (2) and (3) and the leading edge intersection (1).
Subtask 55-12-11-420-050-D ** ON A/C NOT FOR ALL
E. Installation of the Leading Edge Section
   (1) Put the leading edge section (1) in position.
   (2) Make sure that the rubber strip (7) touches the fuselage skin.
   (3) Install and tighten the screws (4).
Subtask 55-12-11-420-051-C ** ON A/C NOT FOR ALL
F. Installation of the Inboard and Outboard Leading-Edge Sections
   (1) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) on the mating surfaces of the leading edge section (3) at RIB25 and along a minimum of 250 mm (9.843 in.).
   (2) Apply the Release Agent-- Solvant Base - (Material No.14DCB1) on the mating surfaces of the leading edge section (3) at RIB25 and along a minimum of 250 mm (9.843 in.).
   (3) Put the leading edge sections (2) and (3) in position.
   (4) Apply Polysulfide Sealant-General Purpose Interfay - (Material No.06AAC1) on the screws (5) and (6).
   (5) Install the screws (4), (5) and (6).
   (6) Let the sealant cure before you tighten the screws (4), (5) and (6).
   (7) Tighten the screws (4), (5) and (6).
Subtask 55-12-11-914-051-B ** ON A/C NOT FOR ALL
G. Sealing
   (1) Apply Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) on the spaces around the leading edge sections (1), (2) and (3).
   (2) Apply the Release Agent-- Solvant Base - (Material No.14DCB1) on the spaces around the leading edge sections (1), (2) and (3).
Subtask 55-12-11-110-050-A
H. Cleaning
   (1) Remove the unwanted sealant with Non Aqueous Cleaner-- Naphta based and Alcohol - (Material No.08BBC1) .
   (2) Clean the surface of the leading edge with Non Aqueous Cleaner-General - - (Material No.08BAA9)
Subtask 55-12-11-081-050-A
I. Remove Locking Pins
   (1) Remove the 98D27903500000 PIN-SIDE STICK LOCKING from the CAPT and F/O side stick controllers.
Subtask 55-12-11-865-051-A
J. 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/THS/ACTR/MOT219CE2B09
** ON A/C NOT FOR ALL
49VUFLIGHT CONTROLS/THS/ACTR/MOT219CE2B04
** ON A/C ALL
121VUFLIGHT CONTROLS/THS ACTR/MOT319CE3Q17
121VUFLIGHT CONTROLS/THS ACTR/MOT119CE1Q16
Subtask 55-12-11-710-050-B
K. Operational Test
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.
   (1) Operate the horizontal stabilizer through the full range of travel. Make sure that the rubber strip does not deform against the fuselage.
5. Close-up
Subtask 55-12-11-410-050-A
A. Visual Inspection
   (1) Make sure that the work area is clean and clear of tools and other items.
Subtask 55-12-11-942-052-A
B. Remove Ground Equipment
   (1) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
[Rev.10 from 2021] 2026.04.01 02:04:45 UTC
"Aviabrain" 2025