Installation of the Brace Tool on the Lockstay Actuator

TASK 32-00-00-480-001-A
Installation of the Brace Tool on the Lockstay Actuator

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.

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	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)
460005832	1	SPRING EXPANDER-MLG SIDE STAY
460006437	1	TOOL-HOLDING
DRT68864	1	LOCK, STAY BRACE TOOL

B. 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 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 32-00-00-481-002-A	Installation of the Safety Devices on the Landing Gear Doors
TASK 32-11-19-481-001-A	Installation of the MLG Spring-Expander Tool
MLG Lockstay Actuator Brace Tool
MLG Lockstay Actuator Brace Tool

3. Job Set-up
Subtask 32-00-00-941-060-A

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure that the ground safety locks are installed on the landing gear and the landing gear doors (Ref. AMM TASK 32-00-00-481-001) and (Ref. AMM TASK 32-00-00-481-002).
(3) On panel 400VU:

Make sure that the landing-gear control-lever 6GA is in the DOWN position
Make sure that a WARNING NOTICE(S) is in position to tell persons not to operate the landing gear.

(4) Make sure that a WARNING NOTICE(S) is in position to tell persons not to pressurize:

The Green hydraulic system
The Yellow hydraulic system.

Subtask 32-00-00-860-058-A

B. Aircraft Maintenance Configuration
(1) Make sure that the isolation coupling of the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the Yellow and Green Hydraulic Systems are depressurized (Ref. AMM TASK 29-10-00-864-002) and (Ref. AMM TASK 29-10-00-864-001).
(3) Make sure that the applicable hydraulic system reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001)
(4) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position below the applicable side-stay, at zone 733 or 743.

Subtask 32-00-00-865-056-A

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R33
121VU	LGCIU/BAT SPLY/SYS1	58GA	R32
** ON A/C ALL
121VU	HYDRAULIC/LGCIU/SYS2	2GA	Q35
121VU	HYDRAULIC/LGCIU/SYS1/GRND SPLY	52GA	Q34
** ON A/C NOT FOR ALL
121VU	LGCIU/BAT SPLY/SYS2	59GA	R32
121VU	LGCIU/BAT SPLY/SYS1	58GA	R31

4. Procedure
Subtask 32-00-00-480-050-A

A. Installation of the Brace Tool on the Lockstay Actuator

WARNING: DURING THIS TEST, MAKE SURE THAT THE LOCK-STAY STAYS IN THE LOCKED OVER-CENTER POSITION. DO NOT ADJUST THE SPRING EXPANSION TOOL OR THE LOCK-STAY BRACE TOOL BECAUSE THIS CAN MOVE THE LOCK-STAY TO THE UNLOCKED OVER-CENTER POSITION. IF THE LOCK-STAY IS IN THE UNLOCKED OVER-CENTER POSITION, THE LEG CAN MOVE AND CAUSE INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.

(1) Install the 460005832 SPRING EXPANDER-MLG SIDE STAY (Ref. AMM TASK 32-11-19-481-001).
(2) Remove the MLG lockstay actuating cylinder as follows:
(a) Remove and discard the cotter pin (5).
(b) Remove the nut (4) and the washer (3).
(c) Release the tab washer (11).
(d) Use the 460006437 TOOL-HOLDING to hold the pin (8) and remove the bolt (10).
(e) Remove the tab washer (11) and the sleeve (12). Discard the tab washer (11).
(f) Adjust the driving nut of the 460005832 SPRING EXPANDER-MLG SIDE STAY, until the pin (2) can be easily turned by hand.
(3) Hold the actuating cylinder (7) (weight 3.3 kg (7.2753 lb)) and remove:

The pin (2)
The washers (1) and (6)
The pin (8)
The washers (9).

(a) Keep the washers (6) and (9).
(4) Remove the actuating cylinder (7). Temporarily attach the actuating cylinder to the adjacent structure.
(a) Do not let the cylinder weight be held with the hoses only. This can cause damage to the hoses.
(5) Install the DRT68864 LOCK, STAY BRACE TOOL (13) as follows:
(a) Replace the removed lockstay actuator (7) with the DRT68864 LOCK, STAY BRACE TOOL (13).
(b) Loosen the lock-nuts (15).
(c) Turn the adjuster-nut (16) to adjust the length of the DRT68864 LOCK, STAY BRACE TOOL. Set the brace tool length until its ends align with the sidestay and lockstay attachments.
(d) Install the pin (8).
(e) Install the pin (2) and the washer (1).
(f) Install the washer (3) and the nut (4).
(g) Install the sleeve (12) and the bolt (10).
(h) Tighten the lock-nuts (15).
(6) Attach the lockstay actuator to the DRT68864 LOCK, STAY BRACE TOOL (13) as follows:
(a) Release and open the clamps (20) on the support-arms (18) and (21).
(b) Put the lockstay actuator (7) on the DRT68864 LOCK, STAY BRACE TOOL (13).
(c) Put the lockstay actuator (7) in position in the support arms (18) and (21). Make sure that it is clear of the adjacent aircraft structure. If the lockstay actuator touches the side-stay or wing structure, adjust as follows:
1 Loosen screws (19) on the brace tool (13).
2 Move the support arms (18) and (21) until there is sufficient clearance.
3 Tighten screws (19) to hold the support arms (18) and (21) in position.
4 Make sure that there is sufficient clearance around the lockstay actuator rod eye-end for a full extension and retraction.
(d) Adjust the spindles (17) until the support clamps (20) can be closed. Make sure that the clamps put sufficient pressure on the lockstay actuator to hold it in position during the test.

[Rev.10 from 2021] 2026.04.01 12:30:10 UTC