Blending of the Stage 1 Booster Vane Assembly [CFMB]

TASK 72-21-00-320-004-A
Blending of the Stage 1 Booster Vane Assembly

FIN: 1000EM1 ** ON A/C NOT FOR ALL
FIN: 1000EM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE
No specific	AR	FILE - SMOOTH
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.CP2189)	durite G422
(Material No.CP2191)	durite G421

C. Referenced Information

REFERENCE	DESIGNATION
TASK 70-51-00-230-002-A	Fluorescent-Penetrant Inspection-Portable-Water Washable
TASK 72-21-00-000-007-A	Removal of the Fan Rotor Blades
TASK 72-21-00-400-007-A	Installation of the Fan Rotor Blades
Blending of a Stage 1 Vane Assembly Leading Edge

3. Job Set-up
Subtask 72-21-00-941-076-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 an ACCESS PLATFORM 1M (3 FT)-ADJUSTABLE in position.

4. Procedure
Subtask 72-21-00-020-074-A ** ON A/C NOT FOR ALL

A. Remove the Fan rotor blades (Ref. AMM TASK 72-21-00-000-007).

Subtask 72-21-00-220-055-A ** ON A/C NOT FOR ALL

B. Check for dimensions and location of defects on edge and compare with repair limits.

Blending of a Stage 1 Vane Assembly Leading Edge ** ON A/C NOT FOR ALL

Subtask 72-21-00-320-053-A ** ON A/C NOT FOR ALL

C. Perform blending of defects using a FILE - SMOOTH or strips of durite G422 (Material No.CP2189) or durite G421 (Material No.CP2191) , used dry.
(1) Remove a minimum of 0.01 in. (0.25 mm) of base metal in addition to depth of defect.

Subtask 72-21-00-230-053-A ** ON A/C NOT FOR ALL

D. Fluorescent penetrant inspect reworked area (Ref. AMM TASK 70-51-00-230-002). No crack is allowed.

5. Close-up
Subtask 72-21-00-420-078-A ** ON A/C NOT FOR ALL

A. Install the fan rotor blades (Ref. AMM TASK 72-21-00-400-007).

Subtask 72-21-00-869-071-A ** ON A/C NOT FOR ALL

B. Make sure that the work area is clean and clear of tools and other items.

Subtask 72-21-00-942-070-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Remove the access platform(s).
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:41:22 UTC