Installation of the Fuel Diverter and Return Valve [IAE]

TASK 73-13-42-400-010-A
Installation of the Fuel Diverter and Return Valve

WARNING: DO NOT LET ENGINE OIL STAY ON YOUR SKIN FOR A LONG TIME. FLUSH THE OIL FROM YOUR SKIN WITH WATER. THE OIL IS POISONOUS AND CAN GO THROUGH YOUR SKIN AND INTO YOUR BODY.

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

ZONE: 400
FIN: 4018KS ** ON A/C NOT FOR ALL

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 1M(3 FT)
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-124)	Isopropyl Alcohol, Technical grade
(Material No.V10-038)	petroleum
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
7	SEALING RING	AIPC 73-13-42-80-040
6	SEALING RING	AIPC 73-13-42-80-050

E. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-13-911-010-A	Procedures for the Installation of Preformed Packings
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 73-13-42-720-010-A	Functional Test of the Fuel Recirculation Cooling System without Barfield Tester and without AIDS
TASK 73-13-42-720-010-A-01	Functional Test of the Fuel Recirculation Cooling System with Barfield Tester and without AIDS
TASK 73-13-42-720-010-A-02	Functional Test of the Fuel Recirculation Cooling System without Barfield Tester and with AIDS
TASK 73-13-42-720-010-A-03	Functional Test of the Fuel Recirculation Cooling System with Barfield Tester and with AIDS
TASK 79-21-43-400-010-B	Installation of the Fuel Cooled Oil Cooler
Fuel Diverter and Return Valve (FDRV)

3. Job Set-up
Subtask 73-13-42-860-050-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) On the center pedestal, on the ENG panel 115VU, make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On the overhead maintenance panel 50VU, make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off. Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.

Subtask 73-13-42-010-051-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR

Subtask 73-13-42-630-050-A ** ON A/C NOT FOR ALL

C. Remove all the covers/caps/plugs from the openings.

Subtask 73-13-42-110-050-A ** ON A/C NOT FOR ALL

D. Clean the fuel diverter.
(1) Make a Textile-Lint free Cotton - (Material No.14SBA1) moist with V01-124Isopropyl Alcohol, Technical grade. Use the cloth to clean the fuel diverter.
and return valve (FDRV) mounting pad on the fuel cooled oil cooler (FCOC).

Subtask 73-13-42-210-050-A ** ON A/C NOT FOR ALL

E. Make sure that the FCOC mounting pad has no damage.

4. Procedure
Subtask 73-13-42-420-050-A ** ON A/C NOT FOR ALL

A. Install the FDRV (5) on to the FCOC (1).

NOTE: Do not install the FDRV independently of the FCOC to the engine. You cannot install the FDRV to the engine after the FCOC installation to the engine. The FDRV must be installed to the engine with the FDRV attached to the FCOC.

(1) Lubricate the AIPC 73-13-42-80-050 SEALING RING (6) and the AIPC 73-13-42-80-040 SEALING RING (7) with petroleum (Material No.V10-038) and
install them to the FCOC (1) (Ref. AMM TASK 70-23-13-911-010).
(2) Align the two bolt holes and slots in the FDRV flange with the threaded holes in the FCOC (1).
(3) Install the FDRV (5) and attach it with the bolts (3) and (4) and the washers (2).
(4) TORQUE the bolts to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).

Subtask 73-13-42-420-051-B ** ON A/C NOT FOR ALL

B. Install the FCOC with the FDRV to the engine (Ref. AMM TASK 79-21-43-400-010).

5. Close-up
Subtask 73-13-42-410-050-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) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(3) Remove the WARNING NOTICE(S).
(4) Remove the access platform(s).

Subtask 73-13-42-790-050-A ** ON A/C NOT FOR ALL

B. Do a functional test of the fuel recirculation cooling system (Ref. AMM TASK 73-13-42-720-010).

[Rev.10 from 2021] 2026.04.01 13:05:58 UTC