Operational Check of the Cut-Out Valve

TASK 32-33-00-710-002-A
Operational Check of the Cut-Out Valve

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.

CAUTION: MAKE SURE THAT THE RIGGING PINS ARE REMOVED BEFORE OPERATION OF THE FREE FALL SYSTEM. DAMAGE WILL OCCUR IF THE RIGGING PINS ARE INSTALLED DURING SYSTEM OPERATION.

FIN: 2515GM

1. Reason for the Job
To do an operational check of the Cut-Out Valve (2515GM) with the aircraft weight-on-wheels.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ROD - NON METALLIC
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TIE WRAP(S)
No specific	1	WARNING NOTICE(S)
98F32304000000	6	TARGET-FALSE

B. Referenced Information

REFERENCE	DESIGNATION
TASK 29-10-00-863-001-A	Pressurize the Green Hydraulic System with a Hydraulic Ground Power-Cart
TASK 29-10-00-864-001-A	Depressurize the Green Hydraulic System
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 32-00-00-860-001-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 32-22-00-010-001-A	Nose Gear Doors - Ground Doors Opening
TASK 32-22-00-410-001-A	Nose Gear Doors - Ground Doors Closing

3. Job Set-up
Subtask 32-33-00-941-067-A

A. Safety Precautions
(1) Put the SAFETY BARRIER(S) in position.
(2) Install the ground safety locks on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(3) On panel 400VU:

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

(4) On panel 110VU, make sure that the GRAVITY GEAR EXTN handle is folded into the center console.
(5) Put a WARNING NOTICE(S) in position to tell persons not to pressurize the hydraulic system.

Subtask 32-33-00-869-087-A

B. Flight Configuration Precautions
(1) Do the flight configuration precautions (Ref. AMM TASK 32-00-00-860-001).

Subtask 32-33-00-865-077-A

C. Open, safety and tag 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
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

Subtask 32-33-00-010-064-A

D. Get Access

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(1) On panel 110VU, turn the GRAVITY GEAR EXTN handle clockwise two complete turns to fully open the L/G doors.

NOTE: If the NLG doors do not fully open, manually help them to fully open.

(2) Make sure that all the L/G doors are fully open.
(3) Install the safety devices on the landing-gear Doors (Ref. AMM TASK 32-00-00-481-002).

4. Procedure
Subtask 32-33-00-710-054-B

A. Operational Check of the Cut-Out Valve (2515GM) in the Free Fall Position - Mechanical

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

WARNING: DO NOT PUT YOUR FINGERS IN THE UPLOCK MECHANISM. THIS IS DANGEROUS.

(1) Use a ROD - NON METALLIC to carefully close the NLG and MLG uplock hooks.
(2) On panel 110VU, turn the GRAVITY GEAR EXTN handle clockwise one full turn.
(3) Make sure that the NLG and MLG uplock hooks are fully opened.

NOTE: If the NLG and MLG uplock hooks do not fully open, use the ROD - NON METALLIC to fully open the uplock hooks.

(4) On panel 110VU:
(a) Make sure that the GRAVITY GEAR EXTN handle will not turn more than three turns.
(b) Set the GRAVITY GEAR EXTN handle to the closed position.
(c) Fold the GRAVITY GEAR EXTN handle into the center console.
(5) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

1GA, 2GA, 52GA, 58GA and 59GA.

(6) Remove the ground safety locks and close the NLG and MLG doors (Ref. AMM TASK 32-22-00-410-001) and (Ref. AMM TASK 32-12-00-410-001).

Subtask 32-33-00-710-055-B

B. Operational Check of the Cut-Out Valve (2515GM) in the Free Fall Position - Hydraulic

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(1) Open, safety and tag this(these) circuit breaker(s):

1GA, 2GA, 52GA, 58GA and 59GA.

(2) Use the ground door-opening handle to open the NLG and MLG doors (Ref. AMM TASK 32-22-00-010-001) and (Ref. AMM TASK 32-12-00-010-001).
(3) Install the 98D32203502000 SAFETY PIN - NLG DOOR in each NLG door (Ref. AMM TASK 32-00-00-481-002).
(4) Install a 460005835 SLEEVE - GROUND LOCK on the RH MLG door actuator only (Ref. AMM TASK 32-00-00-481-002).
(5) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

1GA, 2GA, 52GA, 58GA and 59GA.

(6) On panel 110VU, turn the GRAVITY GEAR EXTN handle clockwise three full turns.

WARNING: MAKE SURE THAT THE CONTROLS AGREE WITH THE POSITION OF THE ITEMS THEY OPERATE BEFORE YOU PRESSURIZE A HYDRAULIC SYSTEM. UNWANTED MOVEMENT OF HYDRAULICALLY OPERATED ITEMS CAN CAUSE SERIOUS INJURY AND/OR DAMAGE.

(7) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).
(8) Try to close the LH MLG door with the ground door-opening handle. The handle must not move and the LH MLG door must not close.
(9) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).
(10) On panel 110VU:
(a) Set the GRAVITY GEAR EXTN handle to the closed position.
(b) Fold the GRAVITY GEAR EXTN handle into the center console.
(11) Remove the ground safety locks from the the NLG doors and the RH MLG door.
(12) Pressurize the Green hydraulic system (Ref. AMM TASK 29-10-00-863-001).
(13) Close the NLG and the MLG doors (Ref. AMM TASK 32-22-00-410-001) and (Ref. AMM TASK 32-12-00-010-001).
(14) On panel 110VU:
(a) Turn the GRAVITY GEAR EXTN handle clockwise three full turns to open the L/G doors.

NOTE: If the NLG doors do not fully open, manually help them to fully open.

(b) Set the GRAVITY GEAR EXTN handle to the closed position close the landing gear doors.
(c) Fold the GRAVITY GEAR EXTN handle into the center console.

Subtask 32-33-00-710-056-B

C. Operational Check of the Cut-Out Valve in the Normal Position - Hydraulic

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE LANDING GEAR DOORS ARE CLEAR.

(1) Make sure the MLG and NLG ground safety locks are in position (Ref. AMM TASK 32-00-00-481-001).
(2) Open, safety and tag this(these) circuit breaker(s):

1GA
2GA
52GA
58GA
59GA.

(3) Use the TIE WRAP(S) to install the 98F32304000000 TARGET-FALSE on proximity sensors 20GA, 21GA, 22GA, 23GA, 24GA and 25GA.
(4) On panel 400VU, make sure that the landing gear control-lever (6GA) is in the DOWN position.
(5) Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

1GA
2GA
52GA
58GA
59GA.

(6) Pressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-863-001).
(7) On panel 400VU, move the landing gear control-lever (6GA) to the UP position to open the landing gear doors.
(8) Make sure the landing gear doors are fully open.
(9) On panel 400VU, move the landing gear control-lever (6GA) to the DOWN position to close the landing gear doors.
(10) Make sure the landing gear doors are fully closed.
(11) Do steps (7) to (10) three more times.

5. Close-up
Subtask 32-33-00-864-055-A

A. Depressurize the Hydraulic Systems
(1) On panel 400VU, make sure that the landing-gear control-lever 6GA is in the DOWN position.
(2) Depressurize the Green hydraulic system
(Ref. AMM TASK 29-10-00-864-001).

Subtask 32-33-00-860-082-A

B. Aircraft Maintenance Configuration
(1) Remove and discard the TIE WRAP(S).
(2) Remove the 98F32304000000 TARGET-FALSE from proximity sensors 20GA, 21GA, 22GA, 23GA, 24GA and 25GA.

Subtask 32-33-00-869-088-A

C. Ground Configuration Precautions
(1) Do the aircraft ground configuration procedure after flight configuration (Ref. AMM TASK 32-00-00-860-002).

Subtask 32-33-00-942-068-A

D. Removal of Equipment
(1) Remove the SAFETY BARRIER(S).
(2) Remove the WARNING NOTICE(S).
(3) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.01 00:46:21 UTC