Removal of the Structural Guide Vane [PW11]

TASK 72-21-02-000-803-A
Removal of the Structural Guide Vane

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

WARNING: REMOVE OR INSTALL ONLY THREE STRUCTURAL GUIDE VANES AT A TIME ON AN ASSEMBLED ENGINE. STRUCTURAL GUIDE VANES ARE NECESSARY FOR ENGINE STRUCTURE. IF YOU DO NOT OBEY THIS WARNING, INJURY CAN OCCUR.

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

1. Reason for the Job
Use this procedure to remove the structural guide vane.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	COVER - PROTECTION

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-860-833-A	Procedure to Prevent Engine Motoring
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 72-21-05-000-803-A	Removal of the Fan Exit Structural Guide Vane (SGV) Outer Liner Segment
TASK 72-21-08-000-801-A	Removal of the Fan Exit Liner Segments
TASK 72-21-12-000-801-A	Removal of the Inner Structural Guide Vane Liner Segment
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
Structural Guide Vane

3. Job Set-up
Subtask 72-21-02-941-058-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).

Subtask 72-21-02-010-062-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in position.

Subtask 72-21-02-040-055-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Do the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-21-02-010-063-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure

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

Subtask 72-21-02-020-052-A ** ON A/C NOT FOR ALL

A. Removal of the Structural Guide Vane
(1) Find the structural guide vane (1) attached to the rear of the fan case. See the sheet 1 of the figure

Structural Guide Vane ** ON A/C NOT FOR ALL

(2) Remove the fan exit case liner segment required to gain access to the structural guide vane (1). (Ref. AMM TASK 72-21-08-000-801)
(3) Remove the outer liner segments required to gain access to the structural guide vane (1) (Ref. AMM TASK 72-21-05-000-803).
(4) Remove the inner liner segments required to gain access to the structural guide vane (1) (Ref. AMM TASK 72-21-12-000-801).
(5) Remove each structural guide vane (1) as follows:
(a) Remove the two bolts (3) and washers (4) that attach the structural guide vane (1) to the fan intermediate case.
(b) Remove the two screws (19) from the structural guide vane (1) inner diameter surface.
(c) Remove the two bolts (2), two bolts (5), four nuts (7) and four washers (6) from the outer diameter surface.
(d) Removal of the shims

CAUTION: BE CAREFUL NOT TO LET SHIMS FALL ONTO THE ENGINE. IF YOU DO NOT OBEY THIS INSTRUCTION, FOD DAMAGE TO THE ENGINE CAN OCCUR.

1 Remove the shims (8) and (9) if necessary.
2 Record the locations and part numbers of the shims and keep the shims for subsequent installation.
(e) Remove the structural guide vane (1) from the fan case.
(6) Installation of the protection covers

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(a) Make sure that you install COVER - PROTECTION as necessary to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 02:48:36 UTC