Inspection of the LP Compressor Fan Blades and Fan Case Acoustic Linings [IAE]

TASK 72-00-00-200-022-B
Inspection of the LP Compressor Fan Blades and Fan Case Acoustic Linings

1. Reason for the Job
A. This TASK is for V2500-A5 engines.
B. This TASK gives the procedure for the inspection of the LP compressor fan blades and fan case acoustic linings following the loss of one or more acoustic lining cover sheets.

NOTE: Inspection is required to confirm that there have been no adverse effects on the LP compressor fan blades caused by a blockage of the fan exit guide vanes when an acoustic lining cover sheet is released. The blockage effect is higher if more than one cover sheet is released.

NOTE: If any blades are rejected, contact your local IAE Customer Support Representative.

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)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [1000EM1] (ENGINE-1)
437AL, 438AR, 451AL, 452AR
FOR [1000EM2] (ENGINE-2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-010-A	Opening of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 71-13-00-410-010-A	Closing of the Fan Cowls 437AL(447AL),438AR(448AR)
TASK 72-00-00-200-023-B	Eddy Current Inspection of the LP Compressor Fan Blades Leading Edge
TASK 72-00-00-200-024-B	Ultrasonic Inspection of the LP Compressor Fan Blade Roots
TASK 72-31-11-000-010-B	Removal of the LP Compressor Fan Blades
TASK 72-31-11-200-010-B	Inspection of the Low Pressure (LP) Compressor Fan Blades
TASK 72-31-11-400-010-C	Installation of the LP Compressor Fan Blades
TASK 72-32-85-200-010-B	Inspection of the Fan Case Assembly
TASK 72-38-11-000-010-A	Removal of the Inlet Cone
TASK 72-38-11-400-010-A	Installation of the Inlet Cone
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-32-00-010-010-A	Opening of the Thrust Reverser Halves
TASK 78-32-00-410-010-A	Closing of the Thrust Reverser Halves

3. Job Set-up
Subtask 72-00-00-941-120-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 72-00-00-010-163-A ** ON A/C NOT FOR ALL

B. Open the fan cowls (Ref. AMM TASK 71-13-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(2) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 72-00-00-040-087-A ** ON A/C NOT FOR ALL

C. Deactivate the thrust reverser:

WARNING: MAKE SURE THAT THE THRUST REVERSER HYDRAULIC CONTROL UNIT (HCU) IS DEACTIVATED BEFORE YOU DO WORK ON OR AROUND THE THRUST REVERSER. IF THE HCU IS NOT DEACTIVATED, THERE IS A RISK OF UNWANTED THRUST REVERSER OPERATION WHICH CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

(1) Deactivate the thrust reverser hydraulic control unit (HCU) (Ref. AMM TASK 78-30-00-040-012).

Subtask 72-00-00-010-164-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser halves (Ref. AMM TASK 78-32-00-010-010):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 72-00-00-941-121-A ** ON A/C NOT FOR ALL

E. Put the Ground Support Equipment in to Position
(1) Put the ACCESS PLATFORM 1M(3 FT) in position.
(2) Put the MAT - WORK in position.

4. Procedure
Subtask 72-00-00-350-051-A ** ON A/C NOT FOR ALL

A. Remove any unwanted materials from the fan exit guide vanes.

Subtask 72-00-00-010-165-A ** ON A/C NOT FOR ALL

B. Remove the Fairing, the Inlet Cone and the Front Blade Retaining Ring
(1) Remove the fairing (Ref. AMM TASK 72-38-11-000-010)
(a) Write down the position of any trim balance weights that are installed to the 24 installation bolts of the fairing.
(b) Remove the fairing.
(2) Remove the inlet cone (Ref. AMM TASK 72-38-11-000-010)
(a) Write down the position of any trim balance weights that are installed to the 36 bolts flange of the front retaining ring.
(b) Remove the inlet cone.
(3) Remove the front blade-retaining ring (Ref. AMM TASK 72-31-11-000-010).

Subtask 72-00-00-210-118-A ** ON A/C NOT FOR ALL

C. Before the next flight:
(1) Visually examine the face of the leading-edge of the dovetail root of the fan blades.

Subtask 72-00-00-210-119-A ** ON A/C NOT FOR ALL

D. Within 25 hours or 10 flights whichever is the sooner:
(1) Do a leading edge eddy current inspection of the fan blades (Ref. AMM TASK 72-00-00-200-023).

Subtask 72-00-00-210-120-A ** ON A/C NOT FOR ALL

E. Within 25 hours or 10 flights whichever is the sooner:
(1) Remove the fan blades and fillers (Ref. AMM TASK 72-31-11-000-010).
(2) Do an inspection of the LP compressor fan blades (Ref. AMM TASK 72-31-11-200-010).
(3) Do an ultrasonic inspection of the fan blade dovetail (Ref. AMM TASK 72-00-00-200-024).
(4) Do an inspection of the fan case assembly (Ref. AMM TASK 72-32-85-200-010).

NOTE: Coin tap inspection to map areas of disbond that may be present on the remaining acoustic lining cover sheets is also required. This will enable operators to determine whether any repair action is required on these acoustic linings.

(5) Do an inspection of the LP Compressor annulus fillers (Ref. AMM TASK 72-31-11-200-010).

Subtask 72-00-00-410-165-A ** ON A/C NOT FOR ALL

F. Install the Front Blade-Retaining Ring, the Inlet Cone and Fairing
(1) Install the front blade-retaining ring (Ref. AMM TASK 72-31-11-400-010).
(2) Install the inlet cone and fairing and replace any balance weights in their original positions (Ref. AMM TASK 72-38-11-400-010).

Subtask 72-00-00-410-166-A ** ON A/C NOT FOR ALL

G. Install the fan blades and the annulus fillers (Ref. AMM TASK 72-31-11-400-010) and replace any balance weights in their original positions.

5. Close-up
Subtask 72-00-00-410-167-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the thrust reverser halves (Ref. AMM TASK 78-32-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR.
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

Subtask 72-00-00-440-087-A ** ON A/C NOT FOR ALL

B. Activate the thrust reverser HCU (Ref. AMM TASK 78-30-00-440-012).

Subtask 72-00-00-410-168-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowls (Ref. AMM TASK 71-13-00-410-010):
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR.
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR.

Subtask 72-00-00-942-063-A ** ON A/C NOT FOR ALL

D. Remove the Ground Support Equipment
(1) Remove the workmat.
(2) Remove the access platform.
(3) Remove the warning notices.

[Rev.10 from 2021] 2026.04.01 02:44:22 UTC