DOC AIRBUS | AMM A320FInstallation of the Air/Oil Separator Assembly [CFMB]
TASK 72-56-00-400-802-A
Installation of the Air/Oil Separator Assembly
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 72-56-00-860-058-A ** ON A/C NOT FOR ALL
Subtask 72-56-00-420-064-A ** ON A/C NOT FOR ALL
Subtask 72-56-00-942-051-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 02:43:25 UTC
Installation of the Air/Oil Separator Assembly
WARNING:
BE CAREFUL WHEN YOU DO WORK ON THE ENGINE PARTS AFTER THE ENGINE SHUTDOWN. USE APPLICABLE THERMAL GLOVES. THE ENGINE PARTS CAN STAY HOT FOR ONE HOUR AFTER SHUTDOWN AND CAN BURN YOU.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobSelf explanatory
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 | AR | DRY-ICE |
| No specific | 1 | TORQUE MULTIPLIER |
| No specific | 1 | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 65.1 and 58.9 lbf.in (0.74 and 0.67 m.daN )  | |
| No specific | Torque wrench: range to between 823 and 248 lbf.in (9.30 and 2.80 m.daN ) | |
| No specific | Torque wrench: range to between 929.25 and 840.75 lbf.in (10.50 and 9.50 m.daN ) | |
| 856A2661 | 1 | AFT ROTATING AIR/OIL SEPARATOR PULLER |
| 856A3392 | 1 | AFT ROTATING AIR/OIL SEPARATOR WRENCH TORQUE |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.CP2442) | engine oil |
| (Material No.CP5062) | MoS_2 dry film lubricant |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| FOR [1000EM1] (ENGINE-1) | |
| 437AL, 438AR, 451AL, 452AR | |
| FOR [1000EM2] (ENGINE-2) | |
| 447AL, 448AR, 461AL, 462AR | |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 71-13-00-010-040-B | Opening of the Fan Cowl Doors |
| TASK 71-13-00-410-040-B | Closing of the Fan Cowl Doors |
| TASK 72-56-00-000-001-A | Removal of the Flame Arrestor and Flange Assembly |
| TASK 72-56-00-000-002-A | Removal of the Oil Inlet Cover Assembly |
| TASK 72-56-00-400-001-A | Installation of the Flame Arrestor and Flange Assembly |
| TASK 72-56-00-400-002-A | Installation of the Oil Inlet Cover Assembly |
| TASK 78-30-00-081-041-B | Make the Thrust Reverser Serviceable after Maintenance |
| TASK 78-30-00-481-041-B | Make the Thrust Reverser Unserviceable for Maintenance |
| TASK 78-36-00-010-040-B | Opening of the Thrust Reverser Doors |
| TASK 78-36-00-410-040-B | Closing of the Thrust Reverser Doors |
Subtask 72-56-00-860-058-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
Subtask 72-56-00-010-076-A ** ON A/C NOT FOR ALL (1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that a WARNING NOTICE(S) is in position to tell persons not to start the engine.
(2) On overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Make sure that a WARNING NOTICE(S) is in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the ACCESS PLATFORM 1M(3 FT) is in position.
B. Get Access
(1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
Subtask 72-56-00-040-054-A ** ON A/C NOT FOR ALL Subtask 72-56-00-010-077-A ** ON A/C NOT FOR ALL (1) Make sure that the fan cowl doors are open: (Ref. AMM TASK 71-13-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Make sure that the thrust reverser doors are open: (Ref. AMM TASK 78-36-00-010-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
D. Get Access
(1) Make sure that the flame arrestor and the flange assembly are removed (Ref. AMM TASK 72-56-00-000-001).
(2) Make sure that the oil inlet cover assembly is removed (Ref. AMM TASK 72-56-00-000-002).
4. Procedure(1) Make sure that the flame arrestor and the flange assembly are removed (Ref. AMM TASK 72-56-00-000-001).
(2) Make sure that the oil inlet cover assembly is removed (Ref. AMM TASK 72-56-00-000-002).
Subtask 72-56-00-420-064-A ** ON A/C NOT FOR ALL
A. Assembly of the Air/Oil Separator
(1) Assemble the air/oil separator (10).
(b) Install the bolts (100) and attach the air/oil separator cover (110) with the nuts (140) and the washers (130).
1 TORQUE the nuts (140) to between 65.1 and 58.9 lbf.in (0.74 and 0.67 m.daN ).
Subtask 72-56-00-420-065-A ** ON A/C NOT FOR ALL (1) Assemble the air/oil separator (10).
NOTE: The air/oil separator ((337-108-502-0), (337-108-551-0), (337-108-510-0), (337-108-520-0)) are single-part design, this assembly is not required.
(a) Put the air/oil separator cover (110) on the air/ oil separator (120). (b) Install the bolts (100) and attach the air/oil separator cover (110) with the nuts (140) and the washers (130).
1 TORQUE the nuts (140) to between 65.1 and 58.9 lbf.in (0.74 and 0.67 m.daN )
. B. Installation of the Air/Oil Separator Assembly
Measurement and Calculation of the Air/Oil Separator Seating Dimension (337-105-401-0), (305-989-201-0) ** ON A/C NOT FOR ALL
(1) Install the air/oil separator assembly (10).
(a) Install the protector of the 856A2661 AFT ROTATING AIR/OIL SEPARATOR PULLER on the rear vent tube (40) seal teeth.
(b) Measure and record values A and B.
(c) Application of engine oil
(d) Apply a thin layer of MoS_2 dry film lubricant (Material No.CP5062) on the mating surfaces of the rear vent tube (40) and of the air/oil separator (10).
(e) Use of DRY-ICE for the installation of the air/oil separator
2 Remove the air/oil separator (10) from DRY-ICE and install it over the rear vent tube (40). To do this, engage the air/oil separator (10) slots with the rear vent tube (40) lugs. Turn the air/oil separator (10) with your hand to make sure that the lugs engage in the slots.
a Engage the air/oil separator (10) offset slot with the rear vent tube offset lug. The air/oil separator offset slot and tube offset lug are identified by spherical indentations.
(f) Check of the air/oil separator installation
2 Measure Dimension C. Do this measurement at four equally-spaced locations and calculate the average of the four measurements. If the difference between C calculated value and C measured value is more than 0.003 in. (0.0762 mm), remove the parts and do a check for cause.
Subtask 72-56-00-420-066-A ** ON A/C NOT FOR ALL Measurement and Calculation of the Air/Oil Separator Seating Dimension (337-105-401-0), (305-989-201-0) ** ON A/C NOT FOR ALL (a) Install the protector of the 856A2661 AFT ROTATING AIR/OIL SEPARATOR PULLER on the rear vent tube (40) seal teeth.
(b) Measure and record values A and B.
(c) Application of engine oil
WARNING:
USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.
1 Apply a thin layer of engine oil (Material No.CP2442) on the threads of the rear vent tube (40) extension duct and on the journal of the air/oil separator (10). (d) Apply a thin layer of MoS_2 dry film lubricant (Material No.CP5062) on the mating surfaces of the rear vent tube (40) and of the air/oil separator (10).
(e) Use of DRY-ICE for the installation of the air/oil separator
WARNING:
USE THERMAL GLOVES WHEN YOU MOVE OR TOUCH HOT OR COLD PARTS. HOT OR COLD PARTS CAN CAUSE INJURY.
1 Put the forward end of the air/oil separator (10) in DRY-ICE for five minutes minimum. 2 Remove the air/oil separator (10) from DRY-ICE and install it over the rear vent tube (40). To do this, engage the air/oil separator (10) slots with the rear vent tube (40) lugs. Turn the air/oil separator (10) with your hand to make sure that the lugs engage in the slots.
a Engage the air/oil separator (10) offset slot with the rear vent tube offset lug. The air/oil separator offset slot and tube offset lug are identified by spherical indentations.
(f) Check of the air/oil separator installation
CAUTION:
MAKE SURE THAT THE AIR/OIL SEPARATOR IS CORRECTLY INSTALLED. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO THE ENGINE.
1 Calculate Dimension C (using the previously recorded dimensions A and B): C = A - B 2 Measure Dimension C. Do this measurement at four equally-spaced locations and calculate the average of the four measurements. If the difference between C calculated value and C measured value is more than 0.003 in. (0.0762 mm), remove the parts and do a check for cause.
C. Installation of the Separator Nut
(1) Install the Air/Oil Separator Nut (20).
(a) Application of engine oil
(b) Remove the protector of the 856A2661 AFT ROTATING AIR/OIL SEPARATOR PULLER from the rear vent tube (40).
(c) Engage the nut (20) with your hand.
(d) Install the 856A3392 AFT ROTATING AIR/OIL SEPARATOR WRENCH TORQUE as follows:
2 Install the TORQUE MULTIPLIER (70) in the counter torque wrench (60) and the lever arm (80) of the TORQUE MULTIPLIER (70) in the arm fork (90) of the wrench (50).
(e) Install the air/oil separator nut (20) and make sure that the self-locking TORQUE value is to between 823 and 248 lbf.in (9.30 and 2.80 m.daN ).
1 Record this self-locking torque value as value D.
(f) Torque the air/oil separator nut (20) as follow:
1 TORQUE to be applied for the air/oil separator nut (20) is to between 929.25 and 840.75 lbf.in (10.50 and 9.50 m.daN ).
a This torque value is called value E.
2 Torque the air/oil separator nut (20) to a torque value F = D + E.
3 Matchmark the nut position in relation to the shaft.
4 Loosen the air/oil separator nut (20), then torque again to the same value as calculated in Para. 4.C.(1)(f)2_.
5 Examine the matchmarks as follow:
a If the matchmarks are aligned, or if the matchmark on the air/oil separator nut (20) is after the mark on the shaft, go to Para. 4.C.(1)(g).
b If the matchmark on the air/oil separator nut (20) does not reach the mark on the shaft, disassemble the air/oil separator (10) and examine the parts for condition. Then, start the installation procedure again from Para. 4.B.(1)(b).
(g) Remove the 856A3392 AFT ROTATING AIR/OIL SEPARATOR WRENCH TORQUE (50) and the TORQUE MULTIPLIER (70).
5. Close-up(1) Install the Air/Oil Separator Nut (20).
(a) Application of engine oil
WARNING:
USE PERSONAL PROTECTION EQUIPMENT. USE THE ENGINE OIL IN A WELL-VENTILATED AREA. ENGINE OIL IS TOXIC.
1 Apply a thin layer of engine oil (Material No.CP2442) on the threads of the air/oil separator nut (20).(b) Remove the protector of the 856A2661 AFT ROTATING AIR/OIL SEPARATOR PULLER from the rear vent tube (40).
(c) Engage the nut (20) with your hand.
(d) Install the 856A3392 AFT ROTATING AIR/OIL SEPARATOR WRENCH TORQUE as follows:
CAUTION:
MAKE SURE THAT YOU ENGAGE THE SOCKET LUGS OF THE WRENCH AND THE COUNTERTORQUE WRENCH IN THE RELATED SLOTS OF THE AIR/OIL SEPARATOR NUT AND REAR VENT TUBE CORRECTLY. IF YOU DO NOT OBEY THIS INSTRUCTION, YOU CAN CAUSE DAMAGE TO PARTS.
CAUTION:
BE VERY CAREFUL WHEN YOU USE THE TORQUE MULTIPLIER. DO A CHECK OF ALL TORQUE CALCULATIONS TWO TIMES BEFORE YOU PUT FORCE THROUGH THE TORQUE MULTIPLIER. IF YOU DO NOT USE THE TORQUE MULTIPLIER CORRECTLY, YOU CAN CAUSE SERIOUS ENGINE DAMAGE.
1 Engage the guide in the rear vent tube (40). At the same time, engage the wrench (50) and counter torque wrench (60) in the slots of the air/oil separator nut (20) and in the slots of the rear vent tube (40). 2 Install the TORQUE MULTIPLIER (70) in the counter torque wrench (60) and the lever arm (80) of the TORQUE MULTIPLIER (70) in the arm fork (90) of the wrench (50).
(e) Install the air/oil separator nut (20) and make sure that the self-locking TORQUE value is to between 823 and 248 lbf.in (9.30 and 2.80 m.daN )
. 1 Record this self-locking torque value as value D.
(f) Torque the air/oil separator nut (20) as follow:
1 TORQUE to be applied for the air/oil separator nut (20) is to between 929.25 and 840.75 lbf.in (10.50 and 9.50 m.daN )
. a This torque value is called value E.
2 Torque the air/oil separator nut (20) to a torque value F = D + E.
3 Matchmark the nut position in relation to the shaft.
4 Loosen the air/oil separator nut (20), then torque again to the same value as calculated in Para. 4.C.(1)(f)2_.
5 Examine the matchmarks as follow:
a If the matchmarks are aligned, or if the matchmark on the air/oil separator nut (20) is after the mark on the shaft, go to Para. 4.C.(1)(g).
b If the matchmark on the air/oil separator nut (20) does not reach the mark on the shaft, disassemble the air/oil separator (10) and examine the parts for condition. Then, start the installation procedure again from Para. 4.B.(1)(b).
(g) Remove the 856A3392 AFT ROTATING AIR/OIL SEPARATOR WRENCH TORQUE (50) and the TORQUE MULTIPLIER (70).
Subtask 72-56-00-942-051-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) Install the oil inlet cover assembly (Ref. AMM TASK 72-56-00-400-002).
(3) Install the flame arrestor and the flange assembly (Ref. AMM TASK 72-56-00-400-001).
Subtask 72-56-00-410-074-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the oil inlet cover assembly (Ref. AMM TASK 72-56-00-400-002).
(3) Install the flame arrestor and the flange assembly (Ref. AMM TASK 72-56-00-400-001).
B. Close Access
(1) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(2) Remove the access platform(s).
Subtask 72-56-00-440-053-A ** ON A/C NOT FOR ALL Subtask 72-56-00-410-075-A ** ON A/C NOT FOR ALL (1) Close the thrust reverser cowl doors: (Ref. AMM TASK 78-36-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(2) Remove the access platform(s).