Installation of Double Check Valve

TASK 52-36-13-400-001-A
Installation of Double Check Valve

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	CONTAINER - HYDRAULIC FLUID RESISTANT
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	TIE WRAP
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
151AW, 242KF, 252BG

D. Referenced Information

REFERENCE	DESIGNATION
TASK 25-55-11-400-001-A	Installation of the Aft Cargo-Compartment Partition at FR47
TASK 25-55-11-400-002-A	Installation of the Ceiling Panels in the Aft Cargo-Compartment - FR47/FR59
TASK 29-00-00-910-002-A	Safety Procedures of the 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 29-14-00-614-002-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 29-24-00-863-001-A	Pressurize the Yellow Hydraulic System with the Electric Pump
TASK 52-30-00-860-001-A	Open the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-30-00-860-002-A	Close the FWD or Aft Cargo-Compartment Door with the Yellow Electric Pump
TASK 52-36-00-600-001-A	Hydraulic System for the Cargo Compartment Doors - Servicing
TASK 53-00-00-400-801-A-01	Installation of the Floor Panels in the Cabin from FR12 to FR70 (Alternative Installation Procedure - Dry Sealing Concept)
TASK 53-00-00-400-801-A-02	Installation of the Cabin Floor Panels from FR12 to FR70 (Alternative Installation Procedure with the Skyflex Option)
Double Check Valve 3717GM

3. Job Set-up
Subtask 52-36-13-860-052-A

A. Aircraft Maintenance Configuration
(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-10-00-864-002)
(3) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(4) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).
(5) Make sure that the warning notices are in position.
(6) Make sure that the CONTAINER - HYDRAULIC FLUID RESISTANT is below the double check valve 3717GM.

Subtask 52-36-13-865-051-A

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

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
122VU	DOORS/CARGO	1MJ	T12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

4. Procedure
Subtask 52-36-13-420-050-A

A. Installation of the Double Check Valve 3717GM

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

(1) Clean the component interfaces and the adjacent area.
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Put the double check valve (6) in position on the bracket (7).
(4) Install the washer (8) and the nut (9) on the double check valve (6).
(5) Remove the blanking caps from the line ends and from the ports of the double check valve (6).
(6) Make sure that the hydraulic line end-fittings are serviceable.
(7) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the treads of the line end fittings.
(8) Connect the hydraulic lines (1), (2) and (10) on the related ports of the double check valve (6).
(9) TORQUE the union nuts of the hydraulic lines (1), (2) and (10) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(10) Tighten the nut (9) correctly.
(11) Put the spray cover halves (3) and (5) on the hydraulic connections and attach both halves with new TIE WRAP (4).

Subtask 52-36-13-860-050-A

B. Preparation for the Test
(1) Remove the warning notices from the ground service panel and the overhead panel of the cockpit.
(2) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).
(3) Pressurize the Yellow hydraulic system (Ref. AMM TASK 29-24-00-863-001).
(4) Connect the PTU isolation coupling (Ref. AMM TASK 29-23-00-860-002).

Subtask 52-36-13-865-052-A

C. Make sure that this(these) circuit breaker(s) is(are) closed:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
122VU	DOORS/CARGO	1MJ	T12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 52-36-13-710-050-A

D. Operational Test
(1) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-002).
(2) Open and close the cargo door five times to bleed the door hydraulic system (Ref. AMM TASK 52-36-00-600-001).
(3) Make sure that the cargo door is fully opened and the actuator safety locks are installed after the bleeding procedure.
(4) Examine the hydraulic connections of the double check valve 3717GM to make sure that there are no leaks.

5. Close-up
Subtask 52-36-13-410-050-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) Remove the spillage container from the double check valve 3717GM.
(3) Install the ceiling panel 151AC in the AFT cargo compartment (Ref. AMM TASK 25-55-11-400-002).
(4) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-001).
(5) Remove the access platform(s).

Subtask 52-36-13-410-050-B ** 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) Remove the spillage container from the double check valve 3717GM.
(3) Install the partition panel 151AW in the AFT cargo compartment (Ref. AMM TASK 25-55-11-400-001).
(4) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-001).
(5) Remove the access platform(s).

Subtask 52-36-13-410-050-C ** 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) Remove the spillage container from the double check valve 3717GM.
(3) Install the ceiling panel 151EC in the AFT cargo compartment (Ref. AMM TASK 25-55-11-400-002).
(4) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-001).
(5) Remove the access platform(s).

Subtask 52-36-13-410-050-E ** 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) Remove the CONTAINER - HYDRAULIC FLUID RESISTANT from double check valve 3717GM.
(3) If the ACT is installed, install floor panels 242KF and 252BG (Ref. AMM TASK 53-00-00-400-801).
(4) If the ACT is not installed, continue as follows:
(a) Install the partition panel 151AW in the AFT cargo compartment (Ref. AMM TASK 25-55-11-400-001).
(b) Remove the actuator safety locks and close the cargo door (Ref. AMM TASK 52-30-00-860-001).
(c) Remove the access platform(s).

[Rev.10 from 2021] 2026.04.02 06:28:11 UTC