Removal of the Front Blade Retaining Ring [IAE]

TASK 72-31-13-000-010-B
Removal 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	AR	ACCESS PLATFORM 1M(3 FT)
No specific	AR	MAT - WORK
No specific	AR	WARNING NOTICE(S)
IAE1J12188	1	BOLT-PULLER

B. Referenced Information

REFERENCE	DESIGNATION
TASK 72-31-13-400-010-B	Installation of the Front Blade Retaining Ring
TASK 72-38-11-000-010-A	Removal of the Inlet Cone
Illustration of the front blade retaining ring
Illustration of the sectional view of the Fan Module

3. Job Set-up
Subtask 72-31-13-941-059-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a WARNING NOTICE(S) to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a WARNING NOTICE(S) to tell persons not to energize the FADEC 1(2).
(4) Put the ground support equipment in to position.
(a) Put the ACCESS PLATFORM 1M(3 FT) in position to give access to the engine.

CAUTION: DO NOT LET TOOLS, PARTS OR UNWANTED MATERIALS FALL ON THE INTAKE COWL SURFACE WHEN YOU USE THE WORKMAT. TO PREVENT THIS SEAL THE EDGES OF THE WORKMAT WITH TAPE BEFORE YOU USE IT.

(b) Put the MAT - WORK in position in the air intake cowl.

NOTE: Make sure that the red warning pennants of the workmat can be seen external of the aircraft.

NOTE: Make sure that the workmat has sufficient dimensions to give full protection to the lower half of the air intake cowl.

4. Procedure
Subtask 72-31-13-010-054-A ** ON A/C NOT FOR ALL

A. Remove the fairing and the inlet cone (Ref. AMM TASK 72-38-11-000-010).

Subtask 72-31-13-020-055-A ** ON A/C NOT FOR ALL

B. Removal of the Front Blade Retaining Ring

Illustration of the front blade retaining ring ** ON A/C NOT FOR ALL

Illustration of the sectional view of the Fan Module ** ON A/C NOT FOR ALL

(1) Remove the 22 bolts (11) that attach the annulus filler (1) to the front blade retaining ring (6).
(2) Record the balance weights (9) and remove the bolts (10) that attach the front blade retaining ring to the fan disk (4).
(a) Record the size and the position of the balance weights (9) (if installed) on an applicable record sheet.

NOTE: This record is used in (Ref. AMM TASK 72-31-13-400-010) to return the balance weights to the initial positions.

(b) Remove the bolts (10) and the balance weights (9).
(3) Remove the front blade retaining ring (6) from the fan disk (4).
(a) Install the six IAE1J12188 BOLT-PULLER on the threaded holes (13) in the front blade retaining ring.

CAUTION: WHEN YOU TIGHTEN THE PULLER BOLTS, THE FRONT RETAINING RING CAN PULL THE ANNULUS FILLERS. MIGRATION OF THE ANNULUS FILLERS CAN MOVE THE FRONT BLADE RETAINING RING IN THE CIRCUMFERENTIAL DIRECTION AND CAUSE A MISALIGNMENT OF THE PULLER BOLT AND JACKING PAD PIN ON THE FAN DISK. IF THERE IS A MIGRATION OF THE ANNULUS FILLERS, YOU MUST UNLOAD THE PULLER BOLTS AND THEN PUSH THE ANNULUS FILLERS BACK INTO PLACE. IF YOU PUSH THE ANNULUS FILLERS BACK BUT YOU DO NOT UNLOAD THE PULLER BOLTS, IT CAN CAUSE GALLING DAMAGE TO THE DISK SURFACE OUTSIDE OF THE JACKING PAD PIN BECAUSE OF THE PULLER BOLTS.

(b) Turn the puller bolts equally to release the front blade retaining ring from the fan disk.
(c) Remove the front blade retaining ring from the fan disk. Remove the six IAE1J12188 BOLT-PULLER from the front blade retaining ring.

Subtask 72-31-13-020-056-A ** ON A/C NOT FOR ALL

C. Remove the balance weights (7) if installed.

Illustration of the front blade retaining ring ** ON A/C NOT FOR ALL

(1) Record the size and the positions of the balance weights (7) on an applicable record sheet.

NOTE: This record is used in (Ref. AMM TASK 72-31-13-400-010) to return the balance weights to the initial positions.

(2) Remove the nuts (8) and the bolts (5) which attach the balance weights (7) to the front blade retaining ring. Remove the balance weights (7).

[Rev.10 from 2021] 2026.04.01 02:45:08 UTC