Installation of the Air Cooled Oil Cooler (ACOC) Modulating Valve [IAE]

TASK 79-21-51-400-010-A
Installation of the Air Cooled Oil Cooler (ACOC) Modulating Valve

WARNING: BE CAREFUL DURING REMOVAL INSTALLATION OF THE MODULATING VALVE. IT WEIGHS 18lb (8kg).

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

FIN: 4019KS ** 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	MULTIMETER - STANDARD
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )
No specific	Torque wrench: range to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
No specific	Torque wrench: range to between 150 and 142 lbf.in (1.70 and 1.60 m.daN )
No specific	Torque wrench: range to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )
No specific	Torque wrench: range to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V01-001)	cleaning fluid
(Material No.14SBA1)	Textile-Lint free Cotton -

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR

D. Referenced Information

REFERENCE	DESIGNATION
TASK 70-23-11-911-013-A	General Torque Tightening Techniques
TASK 70-23-15-912-010-A	Connection of Electrical Connectors
TASK 71-00-00-710-012-B	Test No.3 : Idle Leak Check
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check
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 73-22-00-710-040-A	Operational Test of the FADEC SYSTEM on the Ground
Air Cooled Oil Cooler (ACOC) Modulating Valve

3. Job Set-up
Subtask 79-21-51-860-050-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).

Subtask 79-21-51-010-051-A ** ON A/C NOT FOR ALL

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

Subtask 79-21-51-110-050-A ** ON A/C NOT FOR ALL

C. Clean components:
(1) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with cleaning fluid (Material No.V01-001) . Use the cloth to clean the mating faces of the air cooled oil cooler and the modulating valve.

Subtask 79-21-51-210-050-A ** ON A/C NOT FOR ALL

D. Examine the mating faces of the air cooled oil cooler and the modulating valve and make sure that they have no damage.

4. Procedure
Subtask 79-21-51-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Air Cooled Oil Cooler (ACOC) modulating valve:

Air Cooled Oil Cooler (ACOC) Modulating Valve ** ON A/C NOT FOR ALL

(1) Install the modulating valve.
(a) Remove all the covers from the openings.
(b) Install the modulating valve on the ACOC.
(c) Position the bracket (37).
(d) Install the bolt (36), washers (34) and nut (33).
(e) Install the bolts (58), washers (57) and nuts (56).
(f) Install the bolts (52), washers (53) and nuts (51).
(g) Install the bolt (54) and the washer (55).
(h) Install the bolt (39) and the washers (38).
(i) TORQUE the nuts (33), (56) and (51) and the bolts (39) and (54) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(j) TORQUE the bolt (35) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(2) Install the supporting links on the modulating valve.
(a) Install the supporting links (43), (48) and (49) on the modulating valve.
(b) Install the bolts (40) and (46), with the washers (41) and (47) and the nuts (42) and (50).
(c) TORQUE the nuts (42) and (50) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(3) Install the fuel tubes and the drain tube.
(a) Install the fuel tubes (1) and (2) and the drain tube (3) on the modulating valve connections.
(b) TORQUE the fuel tube (1) nut to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(c) TORQUE the fuel tube (2) nut to between 150 and 142 lbf.in (1.70 and 1.60 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(d) TORQUE the drain tube (3) nut to between 177 and 159 lbf.in (2.00 and 1.80 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(4) Install the clip assemblies and the electrical connectors.
(a) Install the tube clip assemblies.
(b) Install tube clip assembly nut (15), washer (16) spacer (17) and bolt (18). See Sheet 2/3 View D.
(c) Install the tube clip assembly bolt (19), washer (20) and nut (21). See Sheet 2/3 View H.
(d) Install the tube assembly bolt (23) and washer (22). See Sheet 2/3 View J.
(e) TORQUE the nuts (15) and (21) and the bolt (23) to between 45 and 36 lbf.in (0.51 and 0.41 m.daN )

(Ref. AMM TASK 70-23-11-911-013).
(f) Install the electrical connectors (4) and (5) on the modulating valve (Ref. AMM TASK 70-23-15-912-010)

Subtask 79-21-51-720-050-A ** ON A/C NOT FOR ALL

B. Measure the electrical resistance of the joint between the air cooled oil cooler and the modulating valve with an MULTIMETER - STANDARD. The resistance must not be more than 0.0025/Ohms.

5. Close-up
Subtask 79-21-51-410-050-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)
438AR 437AL.
(b) FOR [1000EM2] (ENGINE-2)
448AR 447AL.
(3) Remove the WARNING NOTICE(S).

Subtask 79-21-51-790-050-B ** ON A/C NOT FOR ALL

B. Test requirements:
(1) Do an operational test of the FADEC (Ref. AMM TASK 73-22-00-710-040) and make sure that on the CFDS no faultrelated to the ACOC Modulating Valve is shown.
(2) Do an idle leak check (Ref. AMM TASK 71-00-00-710-012) or do a dry motor leak check (Ref. AMM TASK 71-00-00-710-045).

[Rev.10 from 2021] 2026.04.01 13:14:23 UTC