Installation of the Check Valve

TASK 27-64-48-400-001-A
Installation of the Check Valve

WARNING: MAKE SURE THAT THE FLIGHT CONTROL SAFETY-LOCKS AND THE WARNING NOTICES ARE IN POSITION.

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.

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

CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:

DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.

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 5M (16 FT)- ADJUSTABLE
No specific	AR	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING SIGN - DANGER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [3626GM]
575CB
FOR [3627GM]
675CB

D. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 27-50-00-866-008-A	Extension of the Flaps on the Ground
TASK 27-50-00-866-008-A-01	Extension of the Flaps/Slats on the Ground
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 27-60-00-866-002-A	Extension-Retraction of the Spoilers for Maintenance
TASK 27-64-00-710-001-A	Operational Test of the Spoiler Hydraulic Actuation
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
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 57-51-37-000-004-A	Removal of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
Check Valves
FOR [3626GM]
TASK 57-51-37-400-004-A	Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)
FOR [3627GM]
TASK 57-51-37-400-004-A	Installation of the Access Panels 575AB(675AB), 575BB(675BB), 575CB(675CB), 575DB(675DB), 575EB(675EB), 575FB(675FB), 575GB(675GB), 575HB(675HB)

3. Job Set-up
Subtask 27-64-48-941-056-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that the SAFETY BARRIER(S) are in position.
(2) Make sure there are WARNING SIGN - DANGER to tell persons not to pressurize the Yellow hydraulic system.
(3) Make sure there are WARNING SIGN - DANGER to tell persons not to operate the flight control system.

Subtask 27-64-48-860-053-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the ACCESS PLATFORM 5M (16 FT)- ADJUSTABLE is below the applicable zone 575 or 675.
(2) Make sure that the applicable access panels 575CB, 675CB have been removed (Ref. AMM TASK 57-51-37-000-004).
(3) Make sure that the flaps are fully extended (Ref. AMM TASK 27-50-00-866-008).
(4) Make sure that the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION is on the flap/slat control lever.
(5) Make sure that spoilers 2 and 3 are lifted (Ref. AMM TASK 27-60-00-866-002).
(6) Make sure that the 98D27604000000 COLLAR-SAFETY, SPOILER or 98D27604004000 COLLAR SAFETY SPOILER is on the applicable rod of the servocontrol.
(7) Make sure that the PTU is disconnected (Ref. AMM TASK 29-23-00-860-001).
(8) Make sure that the Yellow hydraulic-system reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).

Subtask 27-64-48-865-051-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
49VU	HYD/FIRE VALVE/Y/ENG2	3702GD	C14
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

4. Procedure

CAUTION: BE CAREFUL WHEN YOU DO MAINTENANCE TASKS ON THE WING TRAILING EDGE:

DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE RACEWAYS.
DO NOT CAUSE DAMAGE TO THE ELECTRICAL CABLE INSTALLATIONS.
MAKE SURE THAT THE ELECTRICAL CABLES ARE INSTALLED CORRECTLY. INCORRECT INSTALLATION CAN CAUSE DAMAGE.

Subtask 27-64-48-420-051-A ** ON A/C NOT FOR ALL

A. Preparation for Installation

Check Valves ** ON A/C NOT FOR ALL

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Clean the component interface and/or the adjacent area with Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(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) Remove the blanking caps from the line ends.
(5) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads on the check valve (3) and the coupling nuts (1) and (2).

Subtask 27-64-48-420-050-A ** ON A/C NOT FOR ALL

B. Installation of the Check Valve
(1) Install the check valve (3) and tighten the coupling nuts (1) and (2). If removed, install the clamp block adjacent to the check valve (3).
(2) Remove the CONTAINER - HYDRAULIC FLUID RESISTANT from below the check valve (3).

Subtask 27-64-48-866-053-A ** ON A/C NOT FOR ALL

C. Retract the Spoilers

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 spoilers (Ref. AMM TASK 27-60-00-866-002).
(2) On the servo-control, make sure that the pointer on the hex. head is opposite the letter 'O' (Operation) on the housing.

Subtask 27-64-48-865-052-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	HYD/FIRE VALVE/Y/ENG2	3702GD	C14
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
121VU	HYDRAULIC/Y HYD/PUMP ENG2/MONG	3700GD	Q37
121VU	HYDRAULIC/Y HYD/PUMP ENG2/CTL	3701GD	Q36
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 27-64-48-860-054-A ** ON A/C NOT FOR ALL

E. Aircraft Maintenance Configuration
(1) Fill the Yellow hydraulic reservoir (Ref. AMM TASK 12-12-29-611-001), (Ref. AMM TASK 12-12-29-611-002).
(2) Pressurize the Yellow hydraulic system-reservoir (Ref. AMM TASK 29-14-00-614-002).
(3) Connect the PTU (Ref. AMM TASK 29-23-00-860-002).

Subtask 27-64-48-865-054-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18

Subtask 27-64-48-866-052-A ** ON A/C NOT FOR ALL

G. Bleed the Spoilers

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) Extend and retract the spoilers five times (Ref. AMM TASK 27-64-00-710-001), to bleed the Yellow hydraulic system.

Subtask 27-64-48-710-050-A ** ON A/C NOT FOR ALL

H. Test
(1) Do an operational test of the spoilers (Ref. AMM TASK 27-64-00-710-001).
(2) Make sure that there are no leaks from the check valve (3) or the coupling nuts (1) and (2).

Subtask 27-64-48-865-055-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18

5. Close-up
Subtask 27-64-48-410-051-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) If removed, install the applicable access panel:
(a) FOR [3626GM]
install 575CB (Ref. AMM TASK 57-51-37-400-004)
(b) FOR [3627GM]
install 675CB (Ref. AMM TASK 57-51-37-400-004).
(c) Remove the access platform(s).

Subtask 27-64-48-865-056-A ** ON A/C NOT FOR ALL

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FLIGHT CONTROLS/SEC1/NORM/SPLY	21CE1	B08
49VU	FLIGHT CONTROLS/FLP/CTL AND MONG/SYS1	6CV	B07
105VU	FLT CTL/SEC1/STBY SPLY	22CE	B01
121VU	FLIGHT CONTROLS/FLP/CTL AND/MONG/SYS2	8CV	Q21
121VU	FLIGHT CONTROLS/SEC3/SPLY	21CE3	Q19
121VU	FLIGHT CONTROLS/SEC2/SPLY	21CE2	Q18

Subtask 27-64-48-866-051-A ** ON A/C NOT FOR ALL

C. Move the Flaps

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) Remove the 98D27803000000 LOCKING TOOL-FLAP SLAT LEVER,INT. POSITION from the flap/slat control lever.
(2) Retract the flaps fully (Ref. AMM TASK 27-50-00-866-009).

Subtask 27-64-48-942-053-A ** ON A/C NOT FOR ALL

D. Removal of Equipment
(1) Remove the safety barriers.
(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] 2026.03.31 23:55:56 UTC