DOC AIRBUS | AMM A320FShortening of the THS Control Cable
TASK 27-41-00-820-003-A
Shortening of the THS Control Cable
Do this procedure when it is no longer possible to adjust the length of the THS control cables (turnbuckles on the stops).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Referenced Information
3. Job Set-up
Subtask 27-41-00-010-065-A
Subtask 27-41-00-220-062-A
Subtask 27-41-00-860-065-A
[Rev.10 from 2021]
2026.03.31 23:50:44 UTC
Shortening of the THS Control Cable
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.
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.
CAUTION:
MAKE SURE THAT THE AIRCRAFT IS IN THE TEMPERATURE CONDITIONS (STABLE AMBIENT TEMPERATURE) SPECIFIED IN THE AIRCRAFT MAINTENANCE CONFIGURATION PARAGRAPH.
CHANGES IN THE TEMPERATURE CAN CAUSE INCORRECT MEASUREMENTS.
1. Reason for the JobDo this procedure when it is no longer possible to adjust the length of the THS control cables (turnbuckles on the stops).
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE |
| No specific | AR | THERMOMETER |
| No specific | AR | WARNING NOTICE(S) |
| 0U190360 | 1 | PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER |
| 98D27407532000 | 1 | RIGGING PIN - THS MECHANICAL CONTROL |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 130 | FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX |
| 150 | AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT |
| 240 | MID PASSENGER COMPARTMENT |
| 310 | FUSLG TAIL SECTION AFT OF AFT PRESS BHD |
| 312AR, 825, 826 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-33-21-618-001-A | Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Available) |
| TASK 12-33-21-618-001-A-01 | Pre-conditioning through the HP Ground Connection |
| TASK 12-33-21-618-001-A-02 | Pre-conditioning with the APU |
| TASK 12-33-21-618-001-A-03 | Pre-conditioning through the LP Ground Connection (Aircraft Electrical Power Not Available) |
| TASK 25-54-12-000-001-A | Removal of the Forward Cargo-Compartment Partition |
| TASK 27-41-00-820-002-A | Adjustment of the THS Control-Cables Length |
| TASK 53-32-12-000-002-A | Removal of the Cabin Floor Panels |
| TASK 06-41-53-00 | FUSELAGE-DESCRIPTION AND OPERATION |
Adjustment GraphSubtask 27-41-00-010-065-A
A. Get Access
(1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE are in position below cargo compartment doors 825 and 826.
(2) Make sure that cargo compartment doors 825 and 826 are open.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access door 312AR.
(4) Open access door 312AR.
(5) Make sure that the panels are removed:
1 Make sure that the floor panels between FR35 and FR42 are removed (Ref. AMM TASK 53-32-12-000-002). .
(b) In zone 131:
1 Make sure that the forward cargo-compartment partition FR34 is removed (Ref. AMM TASK 25-54-12-000-001).
Subtask 27-41-00-860-064-A (1) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE are in position below cargo compartment doors 825 and 826.
(2) Make sure that cargo compartment doors 825 and 826 are open.
(3) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below access door 312AR.
(4) Open access door 312AR.
(5) Make sure that the panels are removed:
NOTE: Refer to AMM chapter 06 for panels details (Ref. AMM D/O 06-41-53-00).
(a) In zone 241: 1 Make sure that the floor panels between FR35 and FR42 are removed (Ref. AMM TASK 53-32-12-000-002). .
(b) In zone 131:
1 Make sure that the forward cargo-compartment partition FR34 is removed (Ref. AMM TASK 25-54-12-000-001).
B. Aircraft Maintenance Configuration
(1) Make sure that the air conditioning system does not operate (Ref. AMM TASK 12-33-21-618-001).
(2) Make sure that there is no neon light on near the cable, in the cable routing zone.
(3) Let the temperature in the aircraft become stable for a period of three hours before you start the adjustment.
(5) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to operate the pitch trim.
(6) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (5) is in position on the mechanical input of the THS actuator (1).
(7) Make sure that the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) is in position on the tension regulator (2).
4. Procedure(1) Make sure that the air conditioning system does not operate (Ref. AMM TASK 12-33-21-618-001).
(2) Make sure that there is no neon light on near the cable, in the cable routing zone.
(3) Let the temperature in the aircraft become stable for a period of three hours before you start the adjustment.
NOTE: You can do other maintenance actions during the three hour period if they do not change the ambient temperature (no source of heat or cold, aircraft not energized, no air conditioning, no neon light sources in the cable routing area).
(4) Make sure that the pitch-trim control wheels are in the '0' position. (5) Put a WARNING NOTICE(S) in position in the cockpit to tell persons not to operate the pitch trim.
(6) Make sure that the 0U190360 PIN-RIGGING,THS ACTUATOR,MECHANICAL INPUT LEVER (5) is in position on the mechanical input of the THS actuator (1).
(7) Make sure that the 98D27407532000 RIGGING PIN - THS MECHANICAL CONTROL (11) is in position on the tension regulator (2).
Subtask 27-41-00-220-062-A
A. Measurement
(1) Measure the cable zone temperature and the external temperature with a THERMOMETER. Make sure that the temperature is the same at plus or minus 2 Deg.C (plus or minus 3.60 Deg.F).
Subtask 27-41-00-820-053-A (1) Measure the cable zone temperature and the external temperature with a THERMOMETER. Make sure that the temperature is the same at plus or minus 2 Deg.C (plus or minus 3.60 Deg.F).
B. Shortening of the THS Control Cables
(1) Adjust the two turnbuckles to the dimension 'C' = 30 mm (1.18 in.).
(2) Find the correct value to cut the cables.
(a) Use the adjustment graph to find the position of the index of the tension regulator (2) in relation to the ambient temperature.
(b) Put marks on the two cables where the cable routing is straight and near the structure.
(c) In the fuselage between two static fairleads, pull the two cables at the same time until the index of the tension regulator is at the position found on the graph.
(e) For each cable side, subtract 35 mm (1.3780 in.) from the value measured before.
(3) Use the measured clearance between the turnbuckles and the static fairleads to cut the rear cable junction by the calculated value.
(5) Do the adjustment of the THS control-cable length (Ref. AMM TASK 27-41-00-820-002).
(6) Make sure that the clearances 'A' between the ends of the terminal studs (cable side) and the fairleads are a minimum of 25.4 mm (1.00 in.) along the full travel range of the THS control.
(7) Make sure that the distance 'B' between the ends of the terminal studs (cable side) in each THS control cable is a minimum of 20 mm (0.79 in.) along the full travel range of the THS control.
(8) Make sure that the turnbuckles are in the adjustment range of 38.2 mm (1.50 in.).
5. Close-up(1) Adjust the two turnbuckles to the dimension 'C' = 30 mm (1.18 in.).
(2) Find the correct value to cut the cables.
(a) Use the adjustment graph to find the position of the index of the tension regulator (2) in relation to the ambient temperature.
(b) Put marks on the two cables where the cable routing is straight and near the structure.
(c) In the fuselage between two static fairleads, pull the two cables at the same time until the index of the tension regulator is at the position found on the graph.
NOTE: Pull the cables down to get the necessary force and measure the cable travel 'Y' along the aircraft axis.
(d) Measure with the marks (on the cables and on the structure) the cable travel 'Y' on each cable to get the necessary cable length. (e) For each cable side, subtract 35 mm (1.3780 in.) from the value measured before.
NOTE: 35 mm (1.3780 in.) is the cable penetration into the terminal stud of one turnbuckle.
(f) The value 'X' (to cut the cable) = 'Y' (cable travel) - 35 mm (1.3780 in.). | ------------------------------------------------------------------------------- |
| ! Example: ! |
| ! Measured cable travel 'Y' for each cable = 110 mm (4.33 in.) ! |
| ! Cable penetration into the terminal stud = 35 mm (1.38 in.) ! |
| ! Value 'X' to cut the cable = 110 mm - 35 mm = 75 mm ! |
| ! (4.33 in. - 1.38 in. = 2.95 in.)! |
| !-----------------------------------------------------------------------------! |
| ! Cut the two rear cables by 75 mm (2.95 in.). ! |
| ------------------------------------------------------------------------------- |
(3) Use the measured clearance between the turnbuckles and the static fairleads to cut the rear cable junction by the calculated value.
NOTE: Cut the two rear cables by the same value.
(4) Install the new terminal studs on the cables (Ref. CFM Cable Fabrication Man). (5) Do the adjustment of the THS control-cable length (Ref. AMM TASK 27-41-00-820-002).
(6) Make sure that the clearances 'A' between the ends of the terminal studs (cable side) and the fairleads are a minimum of 25.4 mm (1.00 in.) along the full travel range of the THS control.
(7) Make sure that the distance 'B' between the ends of the terminal studs (cable side) in each THS control cable is a minimum of 20 mm (0.79 in.) along the full travel range of the THS control.
(8) Make sure that the turnbuckles are in the adjustment range of 38.2 mm (1.50 in.).
Subtask 27-41-00-860-065-A
A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the special and standard tools and all other items.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the special and standard tools and all other items.