Removal of the LP Compressor Fan Blades [IAE]

TASK 72-31-11-000-010-B
Removal of the LP Compressor Fan Blades

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: USE APPLICABLE GLOVES WHEN YOU TOUCH THE FAN BLADES. THE LEADING EDGES OF THE FAN BLADES ARE SHARP AND CAN CAUSE INJURY.

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 LP COMPRESSOR FAN BLADE. THEY EACH WEIGH APPROXIMATELY 10 lb (4.5 kg).

ZONE: 400

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)
IAE1J12004	1	PULLER PUSHER
IAE1J12091	1	CONTAINER-STORAGE
IAE1J12188	1	BOLT-PULLER
IAE1J12312	1	PROGRAM, DISTRIBUTION - FAN BLADE

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.V06-069)	marker

C. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS

D. Referenced Information

REFERENCE	DESIGNATION
TASK 72-31-11-000-011-B	Removal of the Annulus Fillers
TASK 72-31-11-200-010-B	Inspection of the Low Pressure (LP) Compressor Fan Blades
TASK 72-31-12-200-010-B	Inspection of the Stage 1 Fan Disk and the Rear Blade Retaining Ring
TASK 72-31-12-300-010-A	Replacement of the Stage 1 Fan Disk Rear Ramp - VRS1148
TASK 72-31-12-300-011-A	Repair the Stage 1 Fan Disk Touch up Coating - VRS1149
TASK 72-31-12-300-012-A	Repair of the LP Compressor Fan Disk, Re-apply Coating - VRS1974
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
Fan Blade Puller (IAE1J12004)
Moment Weight Written on the Fan Blade Bottom Face
Storage Container (IAE1J12091)

3. Job Set-up
Subtask 72-31-11-941-071-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).

Subtask 72-31-11-941-072-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 72-31-11-010-052-A ** ON A/C NOT FOR ALL

A. Remove the Fairing and the Inlet Cone (Ref. AMM TASK 72-38-11-000-010).

Subtask 72-31-11-020-056-A ** ON A/C NOT FOR ALL

B. Removal of the 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 LP COMPRESSOR FAN DISK (FAN DISK) INNER SURFACE.

(1) Use the marker (Material No.V06-069) to make a temporary mark between each trim balance weight (20) thru (23) (if installed) and the 36 bolts (24) hole in the front blade retaining ring (17).
(a) Record the part numbers and position of the trim balance weights (20), (21), (22) and (23) (if installed).
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.
(2) Identify the No.1 LP Compressor fan blade (fan blade) by mark on the front blade retaining ring (17).

NOTE: The No.1 fan blade is identified by the mark '1' or '*' on the front retaining ring. IAE SBE 72-0198 introduced a revised marking on the front retaining ring. The front retaining ring is identified with marks '1, 2, 3' on the 24-bolt flange.
The marks are identified in a counter-clockwise direction looking rearward from front of the engine, consistent with the identification that is used on the fan disk and within the IAE1J12312 PROGRAM, DISTRIBUTION - FAN BLADE.

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

(3) Correlate the front retaining ring to the fan disk (15) inner surface with the marker (Material No.V06-069) .

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.

CAUTION: DO NOT REMOVE THE BALANCE WEIGHTS THRU FROM THE 22 BOLT INNER (SCALLOPED) 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.

(a) Remove the 22 bolts (11) which safe the annulus fillers (13) to the front blade retaining ring (17).
(5) Remove the 36 bolts (24) and the trim balance weights (20), (21), (22) and (23) (if installed).
(6) Install the six puller bolts (part of IAE1J12188 BOLT-PULLER) on the six threaded holes (19).

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.

(7) Tighten each of the six puller bolts (part of IAE1J12188 BOLT-PULLER) in increments until the front blade retaining ring (17) is released.
(a) Remove the front blade retaining ring (17).

Subtask 72-31-11-020-071-A ** ON A/C NOT FOR ALL

C. Identify the Position of the Fan Blades and the Annulus Fillers

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

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

(1) Move the No.1 fan blade to Top Dead Center (TDC).
(2) After you remove the front blade retaining ring, use the marker (Material No.V06-069) to identify the position of the fan blades (31) and annulus fillers (13). Starting at the No.1 fan blade, number the fan blades and annulus fillers. When viewed from the front of the engine looking rearwards the fan blades must be numbered in a counter-clockwise direction.
(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.
(3) Identify the fan blade slots on the front face of the fan disk. This will assist during the installation of the fan blades.

NOTE: The numbering sequence is important if re-distribution of the fan blades is required. The sequence of numbering the fan blades is consistent with the sequence that is used in the IAE1J12312 PROGRAM, DISTRIBUTION - FAN BLADE.
The annulus filler that is adjacent to the convex surface of the fan blade as viewed from the front of the engine must be identified with the same number as the fan blade. If a limited number of fan blades is to be removed (i.e. not a full set) go to Para. 4.E.

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

Subtask 72-31-11-020-072-A ** ON A/C NOT FOR ALL

D. Remove the Full Set of Fan Blades

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

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

WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE FAN BLADE. IT WEIGHS APPROXIMATELY 10 LB (4.5 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

WARNING: TAKE CARE TO PREVENT THE LP COMPRESSOR FROM ROTATING, TO PREVENT ROTATION OF THE LP COMPRESSOR FAN BLADES MUST BE REMOVED IN SEQUENCE. IF THE FAN BLADES ARE NOT REMOVED IN SEQUENCE, UNCONTROLLED ROTATION OF THE LP COMPRESSOR CAN OCCUR AND CAN RESULT IN INJURY TO PERSONS.

(1) Remove the 22 annulus fillers (Ref. AMM TASK 72-31-11-000-011).

CAUTION: USE ONLY FAN BLADE PULLER (IAE 1J12004) WHEN YOU REMOVE THE FAN BLADE. IF YOU PUT ANY OTHER TOOL BETWEEN THE REAR BLADE RETAINING RING AND THE BLADE TO REMOVE THE BLADE, THE TOOL CAN CAUSE DAMAGE TO THE REAR BLADE RETAINING RING.

(2) Remove the 22 fan blades (31).

NOTE: This procedure must be used irrespective of the modification standard of the fan blades that are installed on the engine.

(a) Ensure the No.1 fan blade is at TDC.
(b) Install the IAE1J12004 PULLER PUSHER on to the fan disk.

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

1 Align the three locating holes in the plate and clevis assembly (part of IAE1J12004 PULLER PUSHER) with the locating pins on the fan disk.
2 Attach the plate and clevis assembly to the fan disk with the nine screws (part of IAE1J12004 PULLER PUSHER). Tighten the screws.
3 Attach the stopper to the plate and clevis assembly with the two screws (part of IAE1J12004 PULLER PUSHER). Tighten the screws.
4 Install the handle A and B assembly (part of IAE1J12004 PULLER PUSHER) to the plate and clevis assembly with the clevis bolt and the nut (part of IAE1J12004 PULLER PUSHER). Tighten the nut.
(c) Install the strap, (part of IAE1J12004 PULLER PUSHER) around the No.1 fan blade and ensure that the strap is correctly fixed around handle B.
(d) Use the IAE1J12004 PULLER PUSHER to release the fan blade from the fan disk.
1 Slowly move handle A (part of IAE1J12004 PULLER PUSHER) in direction D to move the fan blade forward, move the No.1 fan blade forward until the forward chocking pad is disengaged from the fan disk dovetail slot.

NOTE: When the rear chocking pad touches the rear ramp, you can not move the blade easily because of friction between them. When the blade goes forward sufficiently and the rear chocking pad is apart from the rear ramp, you can remove the blade easily.

(e) Repeat steps (2)(c) and (2)(d) to move the No. 2 fan blade forward.
(f) Remove the No.1 fan blade.

CAUTION: MAKE SURE THAT THE FAN BLADE DOES NOT TOUCH THE ADJACENT FAN BLADES WHILE YOU REMOVE/INSTALL IT. IF YOU LET THE FAN BLADES TOUCH EACH OTHER YOU CAN CAUSE DAMAGE TO THE FAN BLADE(S).

CAUTION: BE CAREFUL WHEN YOU REMOVE THE FAN BLADE. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE FAN BLADE AND THE CHOCKING PADS.

1 Remove the No.1 fan blade. Pull the fan blade forward along the dovetail slot of the fan disk with an axial motion along the axis of the dovetail slot ensuring that the leading and trailing edges of the adjacent fan blades do not contact. Prevent contact between the fan blade and the fan case acoustic panels.
(g) Collect and record all available data (the moment weight data (radial, axial and tangential), serial number and the fan blade mass data) from the fan blade root.

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

NOTE: This data is used in IAE1J12312 PROGRAM, DISTRIBUTION - FAN BLADE If mass weight is not available, a nominal 155 oz can be used.

(h) Put the removed fan blades into the IAE1J12091 CONTAINER-STORAGE.

Storage Container (IAE1J12091) ** ON A/C NOT FOR ALL

(i) Repeat steps (2)(f) and (2)(g) to remove the No. 2 fan blade. Ensure that all the correct radial moment weight and fan blade mass data is recorded.

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

(j) Repeat steps (2)(c) thru (2)(h) to correctly remove all of the remaining fan blades in numerical sequence counter clockwise as viewed from the front of the engine. Make sure that you allow the fan disk to reposition as the centre of gravity of the fan assembly changes, and that all the correct radial moment weight and fan blade mass data is recorded for each of the fan blades.
(k) Remove the IAE1J12004 PULLER PUSHER from the fan disk.

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

1 Remove the nut, the clevis bolt, the handle A and B assembly, the stopper and the two screws from the plate and clevis assembly.
2 Remove the screws and the plate and clevis assembly from the fan disk.

Subtask 72-31-11-020-073-A ** ON A/C NOT FOR ALL

E. Remove the Individual Fan Blade(S)

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

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

WARNING: BE CAREFUL DURING THE REMOVAL OR INSTALLATION OF THE FAN BLADE. IT WEIGHS APPROXIMATELY 10 LB (4.5 KG). IF IT FALLS, IT CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Find the fan blade to be removed, and identify this fan blade as blade X. The next adjacent fan blade in the counter-clockwise direction must also be identified, identify this fan blade as blade Y. Mark the positions of the annulus fillers either side of blade X with the marker (Material No.V06-069) . Also use the marker to identify the annulus filler adjacent to the concave surface of blade Y.

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

(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) Remove the three marked annulus fillers (Ref. AMM TASK 72-31-11-000-011).
(3) Ensure that the first fan blade to be removed (blade X) is at TDC.
(4) Install the IAE1J12004 PULLER PUSHER to the fan disk.

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

(a) Align the three locating holes in the plate and clevis assembly (part of IAE1J12004 PULLER PUSHER) with the locating pins on the fan disk.
(b) Attach the plate and clevis assembly to the fan disk with the nine screws (part of IAE1J12004 PULLER PUSHER). Tighten the screws.
(c) Attach the stopper to the plate and clevis assembly with the two screws (part of IAE1J12004 PULLER PUSHER). Tighten the screws.
(d) Install the handle A and B assembly (part of IAE1J12004 PULLER PUSHER) to the plate and clevis assembly with the clevis bolt and the nut (part of IAE1J12004 PULLER PUSHER). Tighten the nut.
(5) Install the strap (part of IAE1J12004 PULLER PUSHER) around the first blade (blade X) and ensure that the strap is correctly fixed around handle B.
(6) Use the IAE1J12004 PULLER PUSHER to release the fan blade (blade X) the fan disk.
(a) Slowly move handle A (part of IAE1J12004 PULLER PUSHER) in direction D to move the fan blade forward, move the fan blade forward until the forward chocking pad is disengaged from the fan disk dovetail slot.
(7) Repeat step (5), (6) to move the second fan blade (blade Y) forwards.
(8) Removal of the second fan blade.

CAUTION: MAKE SURE THAT THE FAN BLADE DOES NOT TOUCH THE ADJACENT FAN BLADES WHILE YOU REMOVE/INSTALL IT. IF YOU LET THE FAN BLADES TOUCH EACH OTHER YOU CAN CAUSE DAMAGE TO THE FAN BLADE(S).

CAUTION: BE CAREFUL WHEN YOU REMOVE THE FAN BLADE. IF YOU ARE NOT CAREFUL, YOU CAN CAUSE DAMAGE TO THE FAN BLADE AND THE CHOCKING PADS.

(a) Remove the fan blade (blade X). Pull the fan blade forward along the dovetail slot of the fan disk with an axial motion along the axis of the dovetail slot, ensure that the leading and trailing edges of the adjacent fan blades do not contact. Prevent contact between the fan blade and the fan case acoustic panels.

NOTE: Make sure that the second fan blade (blade Y) is made safe by engaging the front chock pad in the fan disk dovetail slot, or by removing blade Y temporarily before installing blade X or its replacement.

(9) Collect and record all available data (the moment weight data (radial, axial and tangential), serial number and the fan blade mass data) from the fan blade root.

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

NOTE: This data is used in IAE1J12312 PROGRAM, DISTRIBUTION - FAN BLADE. If mass weight is not available, a nominal 155 oz can be used.

(10) Put the removed fan blade (blade X) in to the IAE1J12091 CONTAINER-STORAGE.

Storage Container (IAE1J12091) ** ON A/C NOT FOR ALL

(11) Repeat steps E.(1) thru E.(10) as required to remove individual fan blades.
(12) Remove the IAE1J12004 PULLER PUSHER from the fan disk.

Fan Blade Puller (IAE1J12004) ** ON A/C NOT FOR ALL

(a) Remove the nut, the clevis bolt, the handle A and B assembly, the stopper and the two screws from the plate and clevis assembly.
(b) Remove the screws and the plate and clevis assembly from the fan disk.

Subtask 72-31-11-210-069-A ** ON A/C NOT FOR ALL

F. Examine and Repair the Dovetail Slot of the Fan Disk where you removed the Fan Blade(s).
(1) Make sure that there is no sign of looseness or separation between the rear ramp and the fan disk (Ref. AMM TASK 72-31-12-200-010).
(2) Replace the rear ramp if you find signs of looseness or separation (Ref. AMM TASK 72-31-12-300-010).
(3) Make sure that the dry film lubricant is in an acceptable condition (Ref. AMM TASK 72-31-12-200-010).
(4) Repair the fan disk with touch up coating if the lubricant is not in an acceptable condition (Ref. AMM TASK 72-31-12-300-011) or (Ref. AMM TASK 72-31-12-300-012).

Subtask 72-31-11-210-070-A ** ON A/C NOT FOR ALL

G. Examine the Fan Blade(s) which you Removed from the Fan Disk.
(1) Examine the blade root for peeling of the dry film lubricant (Ref. AMM TASK 72-31-11-200-010).
(2) Examine the chocking pads of each fan blade (21) for looseness or separation (Ref. AMM TASK 72-31-11-200-010).

[Rev.10 from 2021] 2026.04.01 02:44:44 UTC