Blend The Surface Damage Of The Fan Exit Stator [PW11]

TASK 72-21-07-300-801-A
Blend The Surface Damage Of The Fan Exit Stator

WARNING: MAKE SURE THAT THE ENGINE SHUTDOWN OCCURRED NOT LESS THAN FIVE MINUTES BEFORE YOU DO THIS PROCEDURE. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

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

ZONE: 430
ZONE: 440

1. Reason for the Job
Use this procedure to blend-repair nicks, scratches and dents on the leading edge of the vane of the fan exit stator.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	MAT - PROTECTIVE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
430	ENG 1 AIR INTAKE, FAN AND ACCESS GEARBOX
440	ENG 2 AIR INTAKE, FAN AND ACCESS GEARBOX

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-28-00-910-802-A	SPOP 533 - Blending and Buffing of Steel, Nickel, Cobalt, Aluminum and Magnesium Alloy Components
TASK 70-28-00-910-803-A	SPOP 42 - Chromate Conversion Coating of Aluminum
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 72-11-03-000-801-A	Removal of the Fan Blades
TASK 72-11-03-400-801-A	Installation of the Fan Blades
Blending of the Surface Damage of the Fan Exit Stator

3. Job Set-up
Subtask 72-21-07-941-053-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do the procedure to prevent engine motoring
(Ref. AMM TASK 71-00-00-860-833).
(2) Put the ACCESS PLATFORM 1M(3 FT) in position.

4. Procedure

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

Subtask 72-21-07-320-050-A ** ON A/C NOT FOR ALL

A. Blend the Surface Damage of the Fan Exit Stator
(1) Put the MAT - PROTECTIVE inside the engine intake cowl and fan case inside surfaces.
(2) If you can get access to the repair area, remove the minimum number of fan blades as necessary to do the repair (Ref. AMM TASK 72-11-03-000-801).
(3) Blend the surface damage on the leading edge of the vane of fan exit stator assembly by SPOP 533 (Ref. AMM TASK 70-28-00-910-802).
For the blend limits refer to Table 1 and

Blending of the Surface Damage of the Fan Exit Stator ** ON A/C NOT FOR ALL

(a) You must not blend more than one vane.
(b) You can blend a maximum of three locations on the leading edge.
(c) The blend length must be a minimum of eight times the maximum blend depth.
(d) The blend radius must be a minimum of five times the maximum blend depth.
(e) After blending, the leading edge contour must be smooth and continuous.
(f) Unless specified differently, the depth mentioned in this repair represent the maximum blend depth permitted after repair and not the depth of damage before repair.
(4) Apply chromate conversion coating touch-up to the repaired area and any unprotected aluminum surfaces by SPOP 42 (Ref. AMM TASK 70-28-00-910-803).
(5) If removed, install the fan blades (Ref. AMM TASK 72-11-03-400-801).
(6) Remove the MAT - PROTECTIVE from the air intake cowl.
(7) Examine the assembly for unwanted objects, damage and correct assembly.

Table 1 - Fan Exit Stator - Blend Limits

Repair Area	Repairable Limits
Area A (leading edge) for:
Nicks, scratches and dents	0.030 in. (0.762 mm) maximum depth

5. Close-up
Subtask 72-21-07-860-051-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:48:55 UTC