Inspection/Check of the HPC Front-Stator Assembly [CFMB]

TASK 72-32-00-210-002-A
Inspection/Check of the HPC Front-Stator Assembly

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.

ZONE: 400

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)
No specific	AR	WARNING NOTICE(S)

B. Work Zones and Access Panels

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

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-13-00-010-040-B	Opening of the Fan Cowl Doors
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
TASK 72-00-00-200-009-A	Off-Schedule Vane Replacement
TASK 72-00-00-200-025-A	Over-Serviceable-Limit Extensions
TASK 72-00-00-200-025-A-01	Over-Serviceable-Limit Extensions
TASK 72-32-00-000-004-A	Removal of the Actuation Ring Connecting Links
TASK 72-32-00-000-802-A	Removal of the Variable-Stator-Vane (VSV) Bellcrank Assembly
TASK 72-32-00-400-004-A	Installation of the Actuation Ring Connecting Links
TASK 72-32-00-400-802-A	Installation of the Variable-Stator-Vane (VSV) Bellcrank Assembly
TASK 72-32-00-960-002-A	Replacement of the Actuation Ring Flanged Bushing (Stages 1 and 2)
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
TASK 78-36-00-010-040-B	Opening of the Thrust Reverser Doors
TASK 78-36-00-410-040-B	Closing of the Thrust Reverser Doors
Compressor Front Stator Assembly-Inspection
Stator Vane ID to Rotor Contact

3. Job Set-up
Subtask 72-32-00-941-053-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 72-32-00-010-058-A ** ON A/C NOT FOR ALL

B. Get access
(1) Open the fan cowl doors: (Ref. AMM TASK 71-13-00-010-040)
(2) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(3) FOR [1000EM2] (ENGINE-2)
447AL 448AR.
(4) Put the ACCESS PLATFORM 1M(3 FT) in position.

Subtask 72-32-00-040-055-A ** ON A/C NOT FOR ALL

C. Make the thrust reverser unserviceable (Ref. AMM TASK 78-30-00-481-041).

Subtask 72-32-00-010-059-A ** ON A/C NOT FOR ALL

D. Open the thrust reverser doors (Ref. AMM TASK 78-36-00-010-040):
(1) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(2) FOR [1000EM2] (ENGINE-2)
461AL 462AR.

4. Procedure
Subtask 72-32-00-210-052-A ** ON A/C NOT FOR ALL

A. Inspection/Check of the HPC Front-Stator Assembly

CAUTION: LEVER ARM DISTRESS OR MISASSEMBLY RESULTING IN VANE SCHEDULING ERRORS IN EXCESS OF 4 DEGREES REQUIRES SPECIAL INSPECTION/ DISPOSITION OF COMPRESSOR ROTOR BLADES.

(1) Inspect the following areas:

NOTE: If vane scheduling error occurs, refer to (Ref. AMM TASK 72-00-00-200-009).

INSPECT/CHECK	MAXIMUM SERVICEABLE LIMITS	REMARKS
1.Casing for:
Cracks	Not serviceable	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
Nicks, pits, scores and scratches	Any number, any length, 0.010 in. (0.25 mm) deep after removal of high metal.	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
2.Vane actuation rings for:
Cracks (or broken)	Not serviceable	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
Distortion, bends, twists or distress	Not serviceable	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
Separation	Not serviceable	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
Damaged or broken lever arm bushing	Bushing body is intact and provides 360 degrees support to lever arm pin.
Missing bushings on stages 1 and 2	Up to three missing bushings for each stage are permitted.	1) If four missing bushings for each stage are found, repair within 200 cycles. Do the replacement of the actuation ring flanged bushing (stages 1 and 2) (Ref. AMM TASK 72-32-00-960-002). 2) Five or more missing bushings for each stage are not permitted. Do the replacement of the actuation ring flange bushing (stages 1 and 2) (Ref. AMM TASK 72-32-00-960-002).
Missing or broken bushing legs	Any amount
3.Actuation ring connector for:
Cracks (or broken) one side only	Not serviceable	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
Cracks (or broken) both sides	Not serviceable
Bushings with broken or missing legs	Any amount
Missing bushings	Not serviceable	Replace connecting link (Ref. AMM TASK 72-32-00-000-004) and (Ref. AMM TASK 72-32-00-400-004).
4.Vane lever arms, Inlet Guide Vane (IGV) and stage 3 for:
Broken or bent	Not serviceable	Remove the engine for replacement of the High Pressure Compressor (HPC) rotor blades in one stage forward of and 2 stages aft of the stage with defective lever arms.
Cracked	Not serviceable	Replace lever arm (Ref. AMM TASK 72-32-00-000-004) and (Ref. AMM TASK 72-32-00-400-004).
Nicks, dents and scratches	Area A not serviceable. Area B 0.010 in. (0.25 mm) after removal of high metal provided bottom of defect is not sharp pointed. Area C (not including pin) 0.002 in. (0.05 mm) deep.
5.Vane lever arms, stages 1 and 2 for: Compressor Front Stator Assembly-Inspection ** ON A/C NOT FOR ALL
Broken or bent	Not serviceable	Remove the engine for replacement of the HPC rotor blades in one stage forward of and 2 stages aft of the stage with defective lever arms.
Cracked	Not serviceable	Remove the engine for replacement of cracked lever arm.
Nicks, dents and scratches	Area A not serviceable. Area B 0.010 in. (0.25 mm) after removal of high metal provided bottom of defect is not sharp pointed. Area C (not including pin) 0.002 in. (0.05 mm) deep.
6.Vane assembly, IGV's and stage 3 for:
Looseness	Any amount of radial and side movement provided bushing not missing. No metal to metal contact allowed (listen for metallic sound while shaking vane stem).	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
7.Vane assembly, stages 1 and 2 for:
Looseness	Any amount of radial and side movement provided bushing not missing. No metal to metal contact allowed (listen for metallic sound while shaking vane stem).	See limit extensions (Ref. AMM TASK 72-00-00-200-025).
8.Vane actuation system (bellcrank assembly) for:
Cracks	Not serviceable	Replace the bellcrank assembly (Ref. AMM TASK 72-32-00-000-802) and (Ref. AMM TASK 72-32-00-400-802).
Nicks, pits, scores and scratches	Any number, any length 0.030 in. (0.76 mm) deep after removal of high metal.	Replace the bellcrank assembly (Ref. AMM TASK 72-32-00-000-802) and (Ref. AMM TASK 72-32-00-400-802).
9.Spherical bearings for:
Looseness of ball in race	0.010 in. (0.25 mm) diametral.	Replace the bellcrank assembly (Ref. AMM TASK 72-32-00-000-802) and (Ref. AMM TASK 72-32-00-400-802).

5. Close-up
Subtask 72-32-00-410-056-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 doors: (Ref. AMM TASK 78-36-00-410-040).
(a) FOR [1000EM1] (ENGINE-1)
451AL 452AR
(b) FOR [1000EM2] (ENGINE-2)
461AL 462AR
(3) Remove the access platform(s).

Subtask 72-32-00-440-053-A ** ON A/C NOT FOR ALL

B. Make the thrust reverser serviceable (Ref. AMM TASK 78-30-00-081-041).

Subtask 72-32-00-410-057-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors: (Ref. AMM TASK 71-13-00-410-040)
(a) FOR [1000EM1] (ENGINE-1)
437AL 438AR
(b) FOR [1000EM2] (ENGINE-2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 13:00:06 UTC