DOC AIRBUS | AMM A320FCheck of Slat 2, 3, 4 and 5 Trailing Edge Backlash
TASK 27-84-62-200-002-A
Check of Slat 2, 3, 4 and 5 Trailing Edge Backlash
Self Explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 27-84-62-941-050-A
Subtask 27-84-62-220-142-A
Subtask 27-84-62-860-054-A
[Rev.10 from 2021]
2026.04.01 07:10:33 UTC
Check of Slat 2, 3, 4 and 5 Trailing Edge Backlash
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 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.
1. Reason for the JobSelf Explanatory
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 | SAFETY BARRIER(S) |
| No specific | AR | WARNING NOTICE(S) |
| 98D27803000000 | 1 | LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 27-80-00-866-004-A | Extending the Slats on the Ground |
| TASK 27-80-00-866-005-A | Retracting the Slats on the Ground |
Slat 2, 3, 4 and 5 - Trailing Edge BacklashSubtask 27-84-62-941-050-A
A. Safety Precautions
(1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the slat controls.
Subtask 27-84-62-860-050-A (1) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.
(2) Put a WARNING NOTICE(S) in the cockpit to tell persons not to operate the slat controls.
B. Aircraft Maintenance Configuration
(2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the slat/flap control lever.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the work area.
4. ProcedureWARNING:
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) Extend the slats fully (Ref. AMM TASK 27-80-00-866-004). (2) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is installed on the slat/flap control lever.
(3) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE below the work area.
Subtask 27-84-62-220-142-A
A. Check of Slat 2, 3, 4 and 5 Trailing Edge Backlash
(1) For dimension X, to check the slat knuckle bearings backlash:
(a) Push the upper trailing edge of the slat down with a hand force of 25 kg (55.1156 lb). Put the load, at each track position, at the trailing edge of the slat. Measure and write down the dimension X.
(b) Pull the upper trailing edge of the slat up with a hand force of 25 kg (55.1156 lb). Put the load, at each track position, at the trailing edge of the slat. Measure and write down the dimension X again.
(c) Subtract the smaller dimension X from the larger dimension X to give you the surface-attachment spherical-bearing backlash. The difference between the two dimensions, that you wrote down, must be no more than 2.0 mm (0.0787 in.).
(2) For dimension Y (tracks 5 thru 12), to check the slat track drive system backlash:
(a) Push the applicable track with a hand force of 25 kg (55.1156 lb) aft. Measure and write down the dimension Y.
(b) Pull the applicable track with a hand force of 25 kg (55.1156 lb) forward. Measure and write down the dimension Y again.
(c) Subtract the smaller dimension Y from the larger dimension Y to give you the rotary-actuator/transmission-shafts backlash. The difference between the two dimensions, that you wrote down, must be no more than 2.5 mm (0.0984 in.).
5. Close-up(1) For dimension X, to check the slat knuckle bearings backlash:
(a) Push the upper trailing edge of the slat down with a hand force of 25 kg (55.1156 lb). Put the load, at each track position, at the trailing edge of the slat. Measure and write down the dimension X.
(b) Pull the upper trailing edge of the slat up with a hand force of 25 kg (55.1156 lb). Put the load, at each track position, at the trailing edge of the slat. Measure and write down the dimension X again.
(c) Subtract the smaller dimension X from the larger dimension X to give you the surface-attachment spherical-bearing backlash. The difference between the two dimensions, that you wrote down, must be no more than 2.0 mm (0.0787 in.).
(2) For dimension Y (tracks 5 thru 12), to check the slat track drive system backlash:
(a) Push the applicable track with a hand force of 25 kg (55.1156 lb) aft. Measure and write down the dimension Y.
(b) Pull the applicable track with a hand force of 25 kg (55.1156 lb) forward. Measure and write down the dimension Y again.
(c) Subtract the smaller dimension Y from the larger dimension Y to give you the rotary-actuator/transmission-shafts backlash. The difference between the two dimensions, that you wrote down, must be no more than 2.5 mm (0.0984 in.).
Subtask 27-84-62-860-054-A
A. Aircraft Configuration
Subtask 27-84-62-942-052-A 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) Retract the slats fully (Ref. AMM TASK 27-80-00-866-005). B. Removal of Equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, 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 safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.