Installation of the L/G Free-Fall Cutout-Valve

TASK 32-33-12-400-001-A
Installation of the L/G Free-Fall Cutout-Valve

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

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: OBEY THE HYDRAULIC SAFETY PROCEDURES. WORK ON THE HYDRAULIC SYSTEMS CAN BE DANGEROUS.

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

FIN: 2515GM

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )
No specific	Torque wrench: range to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )
98DNSA20208060	2	RIGGING PIN

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.04JMD9)	Top Coat Polyurethane-- Decorative Furnishing
(Material No.06LCG9)	Non Hardening Jointing Putty-Medium Temp. Area - -
(Material No.08BBB1)	Non Aqueous Cleaner-- Petroleum Based -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
13	COTTER PIN	AIPC 32-33-03-01-170
10	COTTER PIN	AIPC 32-33-03-20-050
13	COTTER PIN	AIPC 32-33-83-01-020
10	COTTER PIN	AIPC 32-33-83-13-020

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-001-A	Depressurize the Green 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 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-00-00-860-001-A	Flight Configuration Precautions with Electrical Power
TASK 32-00-00-860-001-A-01	Flight Configuration Precautions without Electrical Power
TASK 32-00-00-860-002-A	Ground Configuration after Flight Configuration with Electrical Power
TASK 32-00-00-860-002-A-01	Ground Configuration after Flight Configuration without Electrical Power
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
TASK 32-31-00-720-002-A	Functional Test of the Normal Extension and Retraction of the Landing Gear
TASK 32-33-00-710-002-A	Operational Check of the Cut-Out Valve
TASK 32-33-00-720-001-A	Functional Check of Free-Fall Extension
TASK 51-75-13-916-002-A	Repair to a layer of Corrosion Preventive Compound
Cutout Valve 2515GM - L/G Free Fall
Rigging of the L/G Free-Fall Cutout-Valve 2515GM

3. Job Set-up
Subtask 32-33-12-860-051-A

A. Aircraft Maintenance Configuration
(1) Make sure that the PTU isolation coupling is disconnected (Ref. AMM TASK 29-23-00-860-001).
(2) Make sure that the aircraft electrical circuits are Energized (Ref. AMM TASK 24-41-00-861-002)
(3) Make sure that the flight configuration precautions were obeyed (Ref. AMM TASK 32-00-00-860-001).
(4) Make sure that the Green hydraulic system is depressurized (Ref. AMM TASK 29-10-00-864-001).
(5) Make sure that the reservoir of the Green hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 32-33-12-865-051-A

B. 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
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** 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	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 32-33-12-941-051-A

C. Safety Precautions
(1) Make sure that the WARNING NOTICE(S) are in position:

On the panel 40VU and on the ground service panel to tell persons not to pressurize the Green hydraulic system,
On the free-fall extension-handle to tell persons not to operate the L/G free extension system.

Subtask 32-33-12-560-050-A

D. Preparation of the Replacement component
(1) Remove and discard the cotter pin (10).
(2) Remove the nut (11), the washer (12) and the bolt (14). Remove the lever (9) from the splined shaft of the removed cutout valve (3).
(3) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the splines of the new cutout valve (3), the bolt (14) and the washer (12).
(4) Install the lever (9) on the splined shaft of the cutout valve (3). Make sure that the master splines are aligned.
(5) Install the bolt (14), the washer (12) and the nut (11).
(6) Safety the nut (11) with the new AIPC 32-33-03-20-050 COTTER PIN (10) or AIPC 32-33-83-13-020 COTTER PIN (10).
(7) Apply corrosion protection to the nut (11), the washer (12) and the bolt (14) (Ref. AMM TASK 51-75-13-916-002).

Subtask 32-33-12-560-051-A

E. Preparation for Installation
(1) Clean the mating surfaces with Non Aqueous Cleaner-- Petroleum Based - (Material No.08BBB1) and dry them with filtered compressed air.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Make sure that the parts retained from the removed component are clean and in the correct condition.
(4) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).

4. Procedure
Subtask 32-33-12-420-053-A

A. Installation of the L/G Free-Fall Cutout Valve 2515GM
(1) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bolts (21), the washers (22) and the component interface.
(2) Put the cutout valve (3) in position on the aircraft structure.
(3) Install the washers (22), the bolts (21) and the nuts (4).
(4) Remove the blanking plugs.
(5) Put the elbow assemblies (1), (6) and (20) in position and connect the connectors (2), (5) and (19).
(6) TORQUE the connectors (19) to between 3.2 and 2.9 m.daN (23.60 and 21.39 lbf.ft )

.
(7) TORQUE the connectors (2) and (5) to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

.
(8) Mark the connections with Top Coat Polyurethane-- Decorative Furnishing (Material No.04JMD9) .

Subtask 32-33-12-480-050-A

B. Put the Rigging Pins in position.

Rigging of the L/G Free-Fall Cutout-Valve 2515GM

(1) Put the 98DNSA20208060 RIGGING PIN into the lever and the forward face of the MLG door uplock 2520GM.
(2) Put the 98DNSA20208060 RIGGING PIN through the rigging hole and into the cutout valve (3).

Subtask 32-33-12-820-050-A

C. Adjustment

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(1) Put the adjustable rod (7) between the forks of the lever (9). If the holes are not aligned, adjust the rod (7) as follows:
(a) Remove and discard the lockwire from the locknuts (8).
(b) Loosen the locknuts (8).
(c) Turn the rod (7) until the eye-end is aligned with the holes in the forks of the lever (9).
(d) Make sure that the threads are in safety.
(e) Tighten and safety the locknuts (8) with 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.

Subtask 32-33-12-560-052-A

D. Installation of the Rod
(1) Apply Non Hardening Jointing Putty-Medium Temp. Area - - (Material No.06LCG9) to the bolt (18), the bush (17) and the washer (16).
(2) Put the rod (7) in position.
(3) Install the bush (17), the bolt (18), the washer (16) and the nut (15).
(4) Safety the nut (15) with the new AIPC 32-33-03-01-170 COTTER PIN (13) or AIPC 32-33-83-01-020 COTTER PIN (13).

Subtask 32-33-12-080-050-A

E. Remove the Rigging Pins
(1) Remove the rigging pin from the cutout valve (3) and the lever (9).
(2) Remove the rigging pin from the uplock assembly 2520GM.

Subtask 32-33-12-865-052-A

F. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C ALL
49VU	L/G/LGCIU/SYS1/NORM	1GA	C09
** ON A/C NOT FOR ALL
49VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	H12
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/CTL	1701GK	R35
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R34
** 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	HYDRAULIC/G HYD/PUMP ENG1/MONG	1702GK	R33

Subtask 32-33-12-860-052-A

G. Preparation for Test
(1) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).
(2) If the flight configuration precautions were obeyed, put the aircraft back to the serviceable condition (Ref. AMM TASK 32-00-00-860-002).
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).
(5) Remove the container.
(6) Make sure that the work area is clean and clear of tools and other items.
(7) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(8) If necessary fill the reservoir of the Green hydraulic system to the correct level (Ref. AMM TASK 12-12-29-611-001).

Subtask 32-33-12-720-050-A

H. Functional Test
(1) To do the functional test of the cutout valve (3), do step (a) or (b) as follows:
(a) Do the functional test of the normal extension and retraction of the landing gear (Ref. AMM TASK 32-31-00-720-002)
and
Do a functional test of the free-fall extension system (Ref. AMM TASK 32-33-00-720-001).
(b) Do the operational check of the cutout valve (3) (Ref. AMM TASK 32-33-00-710-002).
(2) Open the right MLG door (Ref. AMM TASK 32-12-00-010-001).
(3) Make sure that there is no hydraulic fluid leakage from the cutout valve (3). Leaks are not permitted.

5. Close-up
Subtask 32-33-12-410-051-A

A. Close Access
(1) Apply corrosion protection to the bolt heads, pipe connections and the adjacent areas (Ref. AMM TASK 51-75-13-916-002).
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Close the right MLG door (Ref. AMM TASK 32-12-00-410-001).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:46:29 UTC