DOC AIRBUS | AMM A320FInstallation of the Annulus Fillers [IAE]
TASK 72-31-11-400-011-B
Installation of the Annulus Fillers
This task is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Referenced Information
3. Job Set-up
Subtask 72-31-11-860-053-A ** ON A/C NOT FOR ALL
Subtask 72-31-11-420-064-A ** ON A/C NOT FOR ALL
(a) If you can push the PLASTIC STRIP in easily, the rubber seal is in the correct position. Go to the step (3).
(b) If you cannot push the PLASTIC STRIP in easily, the rubber seal is possibly in the incorrect position.
Go to the step (2).
(2) Push the rubber seal into the correct position with the PLASTIC STRIP.
(3) Move the PLASTIC STRIP forward.
(b) If the movement becomes difficult, the rubber seal is in the incorrect position. To correct the rubber seal position, go to the step (4).
(4) Correct the position of the annulus filler rubber seal.
(a) Pull the PLASTIC STRIP out of the annulus filler (3).
(b) Push the rubber seal in inner direction with the PLASTIC STRIP to put the rubber seal into the correct position.
(5) Repeat steps (3) and (4) until the PLASTIC STRIP goes to the front of the fan blade (31).
Subtask 72-31-11-410-055-A ** ON A/C NOT FOR ALL 5. Close-up
Subtask 72-31-11-942-073-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:00:58 UTC
Installation of the Annulus Fillers
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
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.
1. Reason for the JobThis task is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE |
| No specific | AR | MAT - WORK |
| No specific | AR | PLASTIC STRIP |
| No specific | AR | WARNING NOTICE(S) |
| No specific | Torque wrench: range to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )  | |
| IAE1J12141 | 1 | BOLT-PUSHER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V01-124) | Isopropyl Alcohol, Technical grade |
| (Material No.V06-069) | marker |
| (Material No.V10-038) | petroleum |
| (Material No.V10-041) | petrolatum, white |
| (Material No.V10-077) | lubricant (engine oil) |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 71-00-00-700-022-B | Test No.8 : Vibration Survey |
| TASK 72-31-11-200-012-B | Inspection of the LP Compressor Annulus Fillers |
| TASK 72-38-11-400-010-A | Installation of the Inlet Cone |
Front Blade Retaining RingSubtask 72-31-11-860-053-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 2M (6 FT) - ADJUSTABLE is in position.
(4) Make sure that the MAT - WORK is in position in the intake cowl.
4. Procedure(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 2M (6 FT) - ADJUSTABLE is in position.
(4) Make sure that the MAT - WORK is in position in the intake cowl.
Subtask 72-31-11-420-064-A ** ON A/C NOT FOR ALL
A. Install the Annulus Fillers
V10-041 petrolatum, white
(2) Install the annulus fillers to their initial positions.
Subtask 72-31-11-280-080-A ** ON A/C NOT FOR ALL NOTE: Make sure that the annulus fillers have been inspected before installation (Ref. AMM TASK 72-31-11-200-012).
(1) Apply (2) Install the annulus fillers to their initial positions.
NOTE: Where possible, replace rejected annulus fillers with fillers of the same weight to keep the previous heavy/light/heavy balance configuration. Where this is not possible, keep the difference in weight between the original and replacement parts to not more than 4g (0.14oz). If it is not possible to install a part that is within 4g (0.14oz) of the rejected annulus filler, do the heavy/light/heavy distribution again to para. 4.B. and do a vibration survey (Ref. AMM TASK 71-00-00-700-022).
NOTE: If you replace one annulus filler and you cannot get within the 4g (0.14oz) difference in weight, you can install two annulus fillers, 180 degrees apart. These two annulus fillers must have the same difference in weight between each other as the two replacement parts, or be within 4g of that difference. The heavier new part should go in the same position as the heavier replaced part.
NOTE: If only one annulus filler is replaced (and no other LP-Compressor assembly parts are replaced or moved) and the replacement part weight difference is not more than 4g (0.14oz) of the original part, it is not necessary to the heavy/light/heavy distribution or a vibration survey.
(3) Hang the rear guide pin of each annulus filler to the hole in the rear blade retaining ring (41). B. Annulus Fillers in a Heavy-Light-Heavy Sequence
(a) Weigh each annulus filler and write the weight on the outer surface of each filler with the marker (Material No.V06-069) .
1 As an alternative to the marker (Material No.V06-069) , it is permitted to use a marker that is specified in IAE V2500 Standard Practices Manual (SPP-V2500-1IA) 70-09-01-400-501 - Procedure To Make Temporary Marks On Components And Assemblies.
(b) Put the annulus fillers on a work bench, in a heavy-light-heavy sequence.
(2) Install the annulus fillers.
(a) Install the annulus fillers between the blades in a heavy-light-heavy sequence.
1 Put the heaviest annulus filler and fit between two blades at any position around disk, H1.
2 Put the second heaviest annulus filler opposite at position H2.
3 Put the lightest annulus filler at position L1.
4 Put the second lightest annulus filler opposite at position L2.
5 Continue to install the remaining annulus fillers in a heavy-light-heavy sequence.
Subtask 72-31-11-420-065-A ** ON A/C NOT FOR ALL NOTE: This Subtask is optional.
NOTE: If this Subtask is carried out, do a vibration survey (Ref. AMM TASK 71-00-00-700-022).
(1) Weigh the annulus fillers. (a) Weigh each annulus filler and write the weight on the outer surface of each filler with the marker (Material No.V06-069) .
1 As an alternative to the marker (Material No.V06-069) , it is permitted to use a marker that is specified in IAE V2500 Standard Practices Manual (SPP-V2500-1IA) 70-09-01-400-501 - Procedure To Make Temporary Marks On Components And Assemblies.
(b) Put the annulus fillers on a work bench, in a heavy-light-heavy sequence.
(2) Install the annulus fillers.
(a) Install the annulus fillers between the blades in a heavy-light-heavy sequence.
1 Put the heaviest annulus filler and fit between two blades at any position around disk, H1.
2 Put the second heaviest annulus filler opposite at position H2.
3 Put the lightest annulus filler at position L1.
4 Put the second lightest annulus filler opposite at position L2.
5 Continue to install the remaining annulus fillers in a heavy-light-heavy sequence.
C. Install the Front Blade Retaining Ring
(2) Align the three locating holes in the front blade retaining ring (17) with the three headless pins (16) attached to the fan disk (15).
(3) Install the four pusher bolts (part of IAE1J12141 BOLT-PUSHER).
(4) Carefully turn each pusher bolt (part of IAE1J12141 BOLT-PUSHER) at 90 degrees apart from each other in increments to apply the same pressure in turn to the front blade retaining ring (17).
(6) Lubricate the threads of the 36 bolts (24) with cleanV10-077 lubricant (engine oil)
(7) Remove the four pusher bolts (part of IAE1J12141 BOLT-PUSHER) from the front blade retaining ring (17).
(8) Install the bolts (24) and the trim balance weights (20) thru (23) (if removed) to their initial position.
(9) Torque the bolts (24) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN ) (Ref. AMM TASK 70-23-11-911-013) in sequence.
(10) Torque the bolts (24) in sequence again to make sure that the bolts (24) are at the correct torque.
Subtask 72-31-11-110-064-A ** ON A/C NOT FOR ALL WARNING:
BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE FRONT BLADE RETAINING RING. IT WEIGHS APPROXIMATELY 10 LB (4.5 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
(1) Identify the correlation mark on the front blade retaining ring (17) signified by the mark '1' or '*' and align this mark with the No.1 fan blade. (2) Align the three locating holes in the front blade retaining ring (17) with the three headless pins (16) attached to the fan disk (15).
(3) Install the four pusher bolts (part of IAE1J12141 BOLT-PUSHER).
(4) Carefully turn each pusher bolt (part of IAE1J12141 BOLT-PUSHER) at 90 degrees apart from each other in increments to apply the same pressure in turn to the front blade retaining ring (17).
NOTE: Hold a fan blade when you turn the pusher bolts to prevent turn of the fan disk.
(5) Continue to turn each pusher bolt (part of IAE1J12141 BOLT-PUSHER) in turn until each locating hole (12) in the front blade retaining ring (17) engages correctly with the locating pins (14). (6) Lubricate the threads of the 36 bolts (24) with clean
(7) Remove the four pusher bolts (part of IAE1J12141 BOLT-PUSHER) from the front blade retaining ring (17).
(8) Install the bolts (24) and the trim balance weights (20) thru (23) (if removed) to their initial position.
(9) Torque the bolts (24) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013) in sequence. (10) Torque the bolts (24) in sequence again to make sure that the bolts (24) are at the correct torque.
D. Clean the Temporary Marks
(1) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist withV01-124 Isopropyl Alcohol, Technical grade
(a) The annulus fillers (13)
(b) The balance weights (20) thru (23) and bolt holes on the front blade retaining ring (17)
Subtask 72-31-11-420-066-A ** ON A/C NOT FOR ALL (1) Make a clean Textile-Lint free Cotton - (Material No.14SBA1) moist with
(a) The annulus fillers (13)
(b) The balance weights (20) thru (23) and bolt holes on the front blade retaining ring (17)
E. Secure the 22 Annulus Fillers with the Bolts
(1) Lubricate the threads of the 22 bolts (11) with cleanV10-077 lubricant (engine oil)
(2) Install the bolts (11).
(3) Torque the bolts (11) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN ) (Ref. AMM TASK 70-23-11-911-013) in the sequence.
(4) Torque the bolts (1) in sequence again to make sure the bolts are at the correct torque.
Subtask 72-31-11-280-053-A ** ON A/C NOT FOR ALL (1) Lubricate the threads of the 22 bolts (11) with clean
(2) Install the bolts (11).
(3) Torque the bolts (11) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013) in the sequence. (4) Torque the bolts (1) in sequence again to make sure the bolts are at the correct torque.
CAUTION:
DO NOT USE A PLASTIC STRIP WITH A ROUGH SURFACE OR EDGES. THE PLASTIC STRIP CAN CAUSE DAMAGE TO THE RUBBER SEAL.
CAUTION:
DO NOT BREAK THE PLASTIC STRIP AND DO NOT LEAVE PIECES OF IT IN THE FAN. THE PIECES CAN CAUSE DAMAGE TO THE RUBBER SEAL.
F. Make Sure that the Annulus Filler Rubber Seal is in the Correct Position (Credit card check) NOTE: Do this subtask for both sides of all the 22 fan blades. The rubber seal of the annulus fillers (13) can move to an incorrect position when you install the front blade retaining ring.
(1) Push the PLASTIC STRIP between the annulus filler (13) and the fan blade at the rear end. (a) If you can push the PLASTIC STRIP in easily, the rubber seal is in the correct position. Go to the step (3).
(b) If you cannot push the PLASTIC STRIP in easily, the rubber seal is possibly in the incorrect position.
Go to the step (2).
(2) Push the rubber seal into the correct position with the PLASTIC STRIP.
(3) Move the PLASTIC STRIP forward.
CAUTION:
DO NO PUSH THE RUBBER SEAL FORWARD WITH THE PLASTIC STRIP. IF IT IS IN THE INCORRECT POSITION, THE PLASTIC STRIP CAN CAUSE DAMAGE TO THE RUBBER SEAL.
(a) If you can move the PLASTIC STRIP in easily, the rubber seal is in the correct position. Continue to move forward and go to the step (5). (b) If the movement becomes difficult, the rubber seal is in the incorrect position. To correct the rubber seal position, go to the step (4).
(4) Correct the position of the annulus filler rubber seal.
(a) Pull the PLASTIC STRIP out of the annulus filler (3).
(b) Push the rubber seal in inner direction with the PLASTIC STRIP to put the rubber seal into the correct position.
(5) Repeat steps (3) and (4) until the PLASTIC STRIP goes to the front of the fan blade (31).
Subtask 72-31-11-942-073-A ** ON A/C NOT FOR ALL
A. Remove the ground support equipment
(1) Remove the workmat from the intake cowl.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Remove the workmat from the intake cowl.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).