DOC AIRBUS | AMM A320FInstallation of the Front Blade Retaining Ring [IAE]
TASK 72-31-13-400-010-B
Installation of the Front Blade Retaining Ring
1. Reason for the Job
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 72-31-13-869-052-A ** ON A/C NOT FOR ALL
Subtask 72-31-13-420-059-A ** ON A/C NOT FOR ALL
(2) Push the front blade retaining ring with the pusher bolts, IAE1J12141 BOLT-PUSHER.
(a) Install the four pusher bolts into the nuts (21) at 90 degrees apart from each other, thru the front blade retaining ring.
(b) Carefully turn the pusher bolts to apply the same pressure in turn to the front blade retaining ring.
(c) Continue to turn each pusher bolt in turn until the face A on the front blade retaining ring touches the fan disk front end.
(3) Lubricate the threads of the 36 bolts (10) with cleanV10-077 lubricant (engine oil)
(4) Remove the four pusher bolts from the front blade retaining ring.
(5) Install the bolts (10) and the balance weights (9), which were removed in (Ref. AMM TASK 72-31-13-000-010) to the initial positions.
(6) TORQUE the bolts (10) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013).
(7) TORQUE the bolts (10) in sequence again to make sure that the bolts are at the correct torque.
Subtask 72-31-13-420-061-A ** ON A/C NOT FOR ALL
(a) If you can push the plastic strip easily, the rubber seal is in the correct position. Go to step (3).
(b) If you can not push the plastic strip easily, the rubber seal is possibly in incorrect position. Go to step (2).
(2) Push the rubber seal in to correct position with the plastic strip.
(3) Move the plastic strip forward.
(a) If you can move the plastic strip easily, the rubber seal is in the correct position. Continue to move forward and go to step (5).
(b) If the movement becomes difficult, the rubber seal is in incorrect position. Correct the rubber seal position by step (4).
(4) Correct the position of the annulus filler rubber seal.
(b) Push the rubber seal in inner direction with the plastic strip to put the rubber seal into the correct position.
(5) Do steps (3) and (4) until the plastic strip goes to the front end of the fan blade.
Subtask 72-31-13-410-052-A ** ON A/C NOT FOR ALL 5. Close-up
Subtask 72-31-13-942-057-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 13:01:01 UTC
Installation of the Front Blade Retaining Ring
1. Reason for the Job
This TASK is for V2500-A5 engines.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| 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 220 and 180 lbf.in (2.49 and 2.03 m.daN ) | |
| IAE1J12141 | 1 | BOLT-PUSHER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.V10-077) | lubricant (engine oil) |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 70-23-11-911-013-A | General Torque Tightening Techniques |
| TASK 72-31-13-000-010-B | Removal of the Front Blade Retaining Ring |
| TASK 72-38-11-400-010-A | Installation of the Inlet Cone |
Illustration of the front blade retaining ringSubtask 72-31-13-869-052-A ** ON A/C NOT FOR ALL
A. Make sure that the aircraft is in the same configuration as for the removal task.
4. ProcedureSubtask 72-31-13-420-059-A ** ON A/C NOT FOR ALL
A. Install the balance weights (7) if they were removed in (Ref. AMM TASK 72-31-13-000-010).
(1) Install the balance weights (7) to the front blade retaining ring (6) at the initial bolt hole positions with the bolts (5) and the nuts (8).
(2) TORQUE the nuts (8) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
Subtask 72-31-13-420-060-A ** ON A/C NOT FOR ALL (1) Install the balance weights (7) to the front blade retaining ring (6) at the initial bolt hole positions with the bolts (5) and the nuts (8).
(2) TORQUE the nuts (8) to between 105 and 85 lbf.in (1.19 and 0.96 m.daN )
(Ref. AMM TASK 70-23-11-911-013). CAUTION:
BE CAREFUL DURING THE REMOVAL OF THE FRONT BLADE RETAINING RING AND THE STAGE 1 FAN BLADE. THEY EACH WEIGH APPROXIMATELY 10lb (4.5kg).
B. Install the front blade retaining ring (6). NOTE: You can increase the temperature of the front blade retaining ring to 176 DEG.F (80 DEG.C) in an air-circulating oven to ease the installation.
(1) Align the three locating holes (12) in the front blade retaining ring with the three headless pins (3) on the fan disk (4). (2) Push the front blade retaining ring with the pusher bolts, IAE1J12141 BOLT-PUSHER.
(a) Install the four pusher bolts into the nuts (21) at 90 degrees apart from each other, thru the front blade retaining ring.
(b) Carefully turn the pusher bolts to apply the same pressure in turn to the front blade retaining ring.
(c) Continue to turn each pusher bolt in turn until the face A on the front blade retaining ring touches the fan disk front end.
(3) Lubricate the threads of the 36 bolts (10) with clean
(4) Remove the four pusher bolts from the front blade retaining ring.
(5) Install the bolts (10) and the balance weights (9), which were removed in (Ref. AMM TASK 72-31-13-000-010) to the initial positions.
(6) TORQUE the bolts (10) to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (7) TORQUE the bolts (10) in sequence again to make sure that the bolts are at the correct torque.
C. Attach the 22 annulus fillers to the retaining ring with the bolts.
(1) Lubricate the threads of the 22 bolts (11) with cleanV10-077 lubricant (engine oil)
(2) Install the bolts.
(3) TORQUE the bolts to between 220 and 180 lbf.in (2.49 and 2.03 m.daN ) (Ref. AMM TASK 70-23-11-911-013).
(4) TORQUE the bolts in sequence again to make sure the bolts are at the correct torque.
Subtask 72-31-13-420-062-A ** ON A/C NOT FOR ALL (1) Lubricate the threads of the 22 bolts (11) with clean
(2) Install the bolts.
(3) TORQUE the bolts to between 220 and 180 lbf.in (2.49 and 2.03 m.daN )
(Ref. AMM TASK 70-23-11-911-013). (4) TORQUE the bolts 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.
D. Make sure that the annulus filler rubber seal is in the correct position. NOTE: Do this subtask for both sides of all 22 fan blades. The rubber seal of the annulus fillers can move to incorrect position when you install the front blade retaining ring.
(1) Push the plastic strip between the annulus filler and the fan blade at the rear end. (a) If you can push the plastic strip easily, the rubber seal is in the correct position. Go to step (3).
(b) If you can not push the plastic strip easily, the rubber seal is possibly in incorrect position. Go to step (2).
(2) Push the rubber seal in to correct position with the plastic strip.
(3) Move the plastic strip forward.
(a) If you can move the plastic strip easily, the rubber seal is in the correct position. Continue to move forward and go to step (5).
(b) If the movement becomes difficult, the rubber seal is in incorrect position. Correct the rubber seal position by step (4).
(4) Correct the position of the annulus filler rubber seal.
CAUTION:
DO NOT PUSH THE RUBBER SEAL THAT IS IN INCORRECT POSITION, FORWARD WITH PLASTIC STRIP, THE PLASTIC STRIP CAN CAUSE DAMAGE TO THE RUBBER SEAL.
(a) Pull the plastic strip out of the annulus filler. (b) Push the rubber seal in inner direction with the plastic strip to put the rubber seal into the correct position.
(5) Do steps (3) and (4) until the plastic strip goes to the front end of the fan blade.
Subtask 72-31-13-942-057-A ** ON A/C NOT FOR ALL
A. Remove the support equipment
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the engine air intake.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the workmat from the engine air intake.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).