Removal of the Annulus Fillers [IAE]

TASK 72-31-11-000-011-B
Removal of the Annulus Fillers

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

CAUTION: BE CAREFUL DURING THE REMOVAL OF THE FRONT BLADE RETAINING RING AND THE FAN BLADE. THEY EACH WEIGH APPROXIMATELY 10 LB (4.5 KG).

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 2M (6 FT) - ADJUSTABLE
No specific	AR	MAT - WORK
No specific	AR	WARNING NOTICE(S)
IAE1J12188	1	BOLT-PULLER

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V06-069)	marker

C. Referenced Information

REFERENCE	DESIGNATION
TASK 72-38-11-000-010-A	Removal of the Inlet Cone
Front Blade Retaining Ring
Fan Blade Removal/Installation
Fan Blades and Annulus Fillers
The Numbering of the Fan Blades and Annulus Fillers
Moment Weight Written on the Fan Blade Bottom Face

3. Job Set-up
Subtask 72-31-11-941-077-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 1(2).
(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) tell persons not to energize the FADEC 1(2).

Subtask 72-31-11-941-078-A ** ON A/C NOT FOR ALL

B. Put the ground support equipment in position
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position to give access to the engine intake.
(2) Put the MAT - WORK in position in the intake cowl.

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

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

4. Procedure
Subtask 72-31-11-010-056-A ** ON A/C NOT FOR ALL

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

Subtask 72-31-11-020-061-A ** ON A/C NOT FOR ALL

B. Remove the Front Blade Retaining Ring

Front Blade Retaining Ring ** 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.

CAUTION: DO NOT PUT ANY TOOLS OR PARTS THAT ARE REMOVED IN THE FAN DISK INNER SURFACE.

(1) Use the marker (Material No.V06-069) to make a temporary mark between each balance weight (20) thru (23) (if installed) and the bolt hole in the front blade retaining ring (17). Record the part numbers and positions of the balance weights (if installed).
(a) 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.
(2) Identify the No.1 fan blade slot on the front blade retaining ring.

NOTE: The No.1 fan blade slot is identified by the mark "1" or "*" on the front retaining ring.

NOTE: IAE SBE 72-0198 introduced the revised the marking on the front retaining ring. The front retaining ring is identified with marks '1, 2, 3' on the 24-bolt hole flange. The marks are identified in a counter-clockwise direction looking rearward from the front of the engine.

(3) Correlate the front blade retaining ring to the fan disk inner surface with a temporary mark. Use the marker (Material No.V06-069) to make a temporary mark on the fan disk.

NOTE: The front retaining ring is offset dowelled to the fan disk. Marking the position of the No.1 fan blade on the fan disk helps you during installation of the front retaining ring.

(a) 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.
(4) Remove the 22 bolts (11) which safety the annulus fillers (13) to the front blade retaining ring (17).
(5) Remove the bolts and balance weights.

CAUTION: DO NOT REMOVE THE BALANCE WEIGHTS (33) THRU (38) FROM THE 22 BOLT INNER (SCALLOPPED) FLANGE. THESE BALANCE WEIGHTS ARE FITTED DURING DYNAMIC BALANCE OF THE LP COMPRESSOR ASSEMBLY AT PRODUCTION OR AT OVERHAUL. REMOVAL OF THESE WEIGHTS CAN RESULT IN SIGNIFICANT OUT OF BALANCE. (Ref. Fig. 402/TASK 72-31-11-991-150).

(a) Remove the 36 bolts (24) and balance weights (20) thru (23) (if installed). Record the part numbers and positions of the balance weights (if installed).
(6) Install the six puller bolts (part of IAE1J12188 BOLT-PULLER) into the threaded holes (19).
(7) Tighten each of the six puller bolts (part of IAE1J12188 BOLT-PULLER) in increments until the front blade retaining ring (17) is released. Remove the front blade retaining ring (17).

Subtask 72-31-11-020-075-A ** ON A/C NOT FOR ALL

C. Prepare to Remove the Annulus Fillers

Front Blade Retaining Ring ** ON A/C NOT FOR ALL

Fan Blade Removal/Installation ** ON A/C NOT FOR ALL

Fan Blades and Annulus Fillers ** ON A/C NOT FOR ALL

The Numbering of the Fan Blades and Annulus Fillers ** ON A/C NOT FOR ALL

(1) Use the marker (Material No.V06-069) to identify the position of the fan blades (31) and annulus fillers (13).
(a) 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.
(2) Starting at the annulus filler adjacent to the convex surface of the No.1 fan blade, number the fillers. When viewed from the front of the engine looking rearwards the annulus fillers must be numbered in a counter-clockwise direction.

Subtask 72-31-11-020-062-A ** ON A/C NOT FOR ALL

D. Remove the Annulus Fillers

Moment Weight Written on the Fan Blade Bottom Face ** ON A/C NOT FOR ALL

Fan Blades and Annulus Fillers ** ON A/C NOT FOR ALL

CAUTION: BE CAREFUL WHEN YOU REMOVE THE ANNULUS FILLERS. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE ANNULUS FILLER RUBBER SEALS.

(1) Remove the annulus fillers (13).
(a) Put the annulus filler that is to be removed at TDC.
(b) Lift the front lug of the annulus filler.
(c) Pull the annulus filler forwards to remove it from the rear blade retaining ring (41).
(d) Turn the filler counter-clockwise and then remove it from the fan disk.
(2) Turn the LP system until the next annulus filler in sequence is at TDC.
(3) Repeat steps D.(1) and D.(2) until all of the annulus fillers have been removed.

[Rev.10 from 2021] 2026.04.01 13:00:55 UTC