DOC AIRBUS | AMM A320FInstallation of the Variable Oil Reduction Valve (VORV) [PW11]
TASK 79-21-15-400-801-A
Installation of the Variable Oil Reduction Valve (VORV)
Use this procedure to install the VORV.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Work Zones and Access Panels
C. Expendable Parts
D. Referenced Information
3. Job Set-up
Subtask 79-21-15-941-051-A ** ON A/C NOT FOR ALL
Subtask 79-21-15-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 03:41:52 UTC
Installation of the Variable Oil Reduction Valve (VORV)
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AND THE ADJACENT COMPONENTS AFTER ENGINE SHUTDOWN. THE ENGINE, THE ENGINE OIL AND THE ADJACENT COMPONENTS CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.
FIN: 4069KS ** ON A/C NOT FOR ALL
1. Reason for the JobUse this procedure to install the VORV.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | ACCESS PLATFORM 1M(3 FT) |
| No specific | 1 | PLIERS - JAWED, SOFT |
| No specific | Torque wrench: range to between 90 and 80 lbf.in (1.02 and 0.90 m.daN )  |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1) | |
| 437AL, 438AR, 451AL | |
| FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2) | |
| 447AL, 448AR, 461AL | |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | GASKET | EIPC 79-21-15-01-090 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-00-00-720-811-A | Test No. 3A - Idle Power Test |
| TASK 71-00-00-860-832-A | Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC |
| TASK 71-13-00-010-802-A | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-802-A | Closing of the Fan Cowl Doors |
| TASK 73-21-00-710-807-A | Test No.6 - EEC Operation Test (Idle Test) |
| TASK 73-25-34-400-802-A | Installation of the Engine Interface Unit (EIU) |
| TASK 78-30-00-040-805-A | Deactivation of the Thrust Reverser System for Ground Maintenance |
| TASK 78-30-00-440-805-A | Reactivation of the Thrust Reverser System after Ground Maintenance |
| TASK 78-36-00-010-802-A | Opening of the Thrust Reverser Cowl-Doors |
| TASK 78-36-00-410-802-A | Closing of the Thrust Reverser Cowl-Doors |
| TASK 79-00-00-610-801-A | Check and Fill the Engine Oil |
Variable Oil Reduction Valve (VORV) (Install the Valve)Subtask 79-21-15-941-051-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
Subtask 79-21-15-010-052-A ** ON A/C NOT FOR ALL (1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).
B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
Subtask 79-21-15-040-051-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR
C. Deactivation of the Thrust Reverser System for Maintenance
Subtask 79-21-15-010-053-A ** ON A/C NOT FOR ALL WARNING:
YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.
(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805). D. Get Access
(1) Make sure that the left thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
4. Procedure(1) Make sure that the left thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
(2) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
CAUTION:
WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.
Subtask 79-21-15-420-050-A ** ON A/C NOT FOR ALL A. Installation of the VORV
(1) Removal of the protection covers.
(2) Install the VORV (1) on the Oil Control Module (OCM) as follows:
(a) Inspect the current gasket (2) for reusability as follows:
1 No raised material on the metal surface.
2 Rubber that is not bonded to the seal plate is not permitted.
3 Rubber that is missing is not permitted.
4 Inspect the rubber seal for separation from the seal plate.
5 Rubber that is cut or damaged is not permitted.
6 Make sure the rubber material is above the metal surface.
(b) Align the EIPC 79-21-15-01-090 GASKET (2) on the VORV (1).
(c) Install two bolts (4) and washers (3) through the upper holes in the VORV (1) to hold the gasket (2) in place as you install the VORV (1) to the OCM.
(d) Install the VORV (1) to the OCM with the three remaining bolts (4) and washers (3).
(e) TORQUE the five bolts (4) to between 90 and 80 lbf.in (1.02 and 0.90 m.daN ) equally in an opposite pattern until the same torque indication holds.
(3) Connect the wiring harness (W03) connector (P54) to the VORV (1) receptacle (J54) as follows:
(b) Push lightly inward on the connector while you tighten the coupling ring.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) Make sure that you can feel the ratchet feature.
(e) While you tighten, push the connector in and from side to side.
(f) Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(4) Fill the engine with oil (Ref. AMM TASK 79-00-00-610-801).
(5) Examine the assembly for foreign objects, damage, and correct assembly.
5. Close-up(1) Removal of the protection covers.
CAUTION:
REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.
(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine. (2) Install the VORV (1) on the Oil Control Module (OCM) as follows:
(a) Inspect the current gasket (2) for reusability as follows:
1 No raised material on the metal surface.
2 Rubber that is not bonded to the seal plate is not permitted.
3 Rubber that is missing is not permitted.
4 Inspect the rubber seal for separation from the seal plate.
5 Rubber that is cut or damaged is not permitted.
6 Make sure the rubber material is above the metal surface.
(b) Align the EIPC 79-21-15-01-090 GASKET (2) on the VORV (1).
(c) Install two bolts (4) and washers (3) through the upper holes in the VORV (1) to hold the gasket (2) in place as you install the VORV (1) to the OCM.
(d) Install the VORV (1) to the OCM with the three remaining bolts (4) and washers (3).
(e) TORQUE the five bolts (4) to between 90 and 80 lbf.in (1.02 and 0.90 m.daN )
equally in an opposite pattern until the same torque indication holds. (3) Connect the wiring harness (W03) connector (P54) to the VORV (1) receptacle (J54) as follows:
CAUTION:
MAKE SURE THAT THE ELECTRICAL CONNECTOR AND RECEPTACLE ARE CLEAN WHEN YOU CONNECT THEM. DIRTY CONNECTORS CAN CAUSE DAMAGE TO EQUIPMENT.
(a) Examine, align and engage the connector. (b) Push lightly inward on the connector while you tighten the coupling ring.
(c) Use the PLIERS - JAWED, SOFT and tighten the connector against the receptacle.
(d) Make sure that you can feel the ratchet feature.
(e) While you tighten, push the connector in and from side to side.
(f) Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(4) Fill the engine with oil (Ref. AMM TASK 79-00-00-610-801).
(5) Examine the assembly for foreign objects, damage, and correct assembly.
Subtask 79-21-15-410-050-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 left thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
Subtask 79-21-15-440-050-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the left thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL
B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).
Subtask 79-21-15-410-051-A ** ON A/C NOT FOR ALL C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).
Subtask 79-21-15-710-050-A ** ON A/C NOT FOR ALL (1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802).
D. Test
(1) Do the test No. 3 - Idle power test (Ref. AMM TASK 71-00-00-720-811).
(2) Do the test No. 6 - EEC - Idle test (Ref. AMM TASK 73-21-00-710-807).
(1) Do the test No. 3 - Idle power test (Ref. AMM TASK 71-00-00-720-811).
(2) Do the test No. 6 - EEC - Idle test (Ref. AMM TASK 73-21-00-710-807).