DOC AIRBUS | AMM A320FRemoval of STA-LOK Nuts and Lockwashers
TASK 20-22-00-000-001-A
Removal of STA-LOK Nuts and Lockwashers
1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Referenced Information
3. Job Set-up
Subtask 20-22-00-941-050-A
Subtask 20-22-00-911-050-A
[Rev.10 from 2021]
2026.03.31 22:59:14 UTC
Removal of STA-LOK Nuts and Lockwashers
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 | WRENCH - STANDARD |
| REFERENCE | DESIGNATION |
|---|---|
STA-LOK Nuts NSA5454Subtask 20-22-00-941-050-A
A. Not Applicable
4. ProcedureSubtask 20-22-00-911-050-A
A. Removal of STA-LOK Nuts and Lockwashers
(1) Use the tool wrenches-notched, tightening of nuts STA-LOK NSA5454 (SL90-315) (Ref. Table 2) and the tool-extraction, tab washers STA-LOK NSA5454 (SL90-314) (Ref. Table 3).
(2) Adjust the tool-extraction, tab washers STA-LOK NSA5454 (SL90-314) so that the inner face of the tool (8) core aligns with the outer face of the tool (9) body.
(5) Turn the tool core to remove the lockwasher (3) from the nut (1).
(6) Remove the lockwasher (3) from the tool.
(7) Install the tool wrenches-notched, tightening of nuts STA-LOK NSA5454 (SL90-315).
(1) Use the tool wrenches-notched, tightening of nuts STA-LOK NSA5454 (SL90-315) (Ref. Table 2) and the tool-extraction, tab washers STA-LOK NSA5454 (SL90-314) (Ref. Table 3).
(2) Adjust the tool-extraction, tab washers STA-LOK NSA5454 (SL90-314) so that the inner face of the tool (8) core aligns with the outer face of the tool (9) body.
NOTE: The tools given in the table below for the lockwasher NSA5454-5DRH are applicable for the nut STA-LOK SL40871.
For the nut STA-LOK SL40290 there is no special tool.
(3) Engage the 2 lugs of the tool through the available slots (5) of the nut (1). For the nut STA-LOK SL40290 there is no special tool.
NOTE: If there is not sufficient space at the end of the pin/bolt, use the special tool-extraction, tab washers STA-LOK NSA5454 (SL90-310).
(Ref. Table 4)
Turn the tool core clockwise. Install the tool on the pin/bolt (2). Turn the tool core counterclockwise until the lugs fit into the available slots (5) of the nut (1).
(4) Turn the tool body to align the tool lugs with the tangs (4) of the lockwasher (3). (Ref. Table 4)
Turn the tool core clockwise. Install the tool on the pin/bolt (2). Turn the tool core counterclockwise until the lugs fit into the available slots (5) of the nut (1).
(5) Turn the tool core to remove the lockwasher (3) from the nut (1).
(6) Remove the lockwasher (3) from the tool.
(7) Install the tool wrenches-notched, tightening of nuts STA-LOK NSA5454 (SL90-315).
NOTE: For STA-LOK NSA 5454-5DRH no special tool is necessary to loosen the nut.
(8) Loosen the nut (1) with the WRENCH - STANDARD .