General Visual Inspection (GVI) of the Engine Exhaust Area [PW11]

TASK 72-00-00-210-812-A
General Visual Inspection (GVI) of the Engine Exhaust Area

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: 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	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	FLASHLIGHT
No specific	1	GLOVES - COTTON, LINT-FREE, CLEAN
No specific	1	MAT - PROTECTIVE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
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 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 72-53-00-220-801-A	Detailed Visual Inspection (DVI) of the Low Pressure Turbine (LPT) 3rd Stage Blades and Outer Air Seals
TASK 72-54-00-210-802-A	Visual Inspection of the Turbine Exhaust Case (TEC) Assembly
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
General Visual Inspection (GVI) of the Engine Exhaust Area

3. Job Set-up
Subtask 72-00-00-941-219-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 72-00-00-010-300-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 1M(3 FT) in position.

Subtask 72-00-00-040-148-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Ground 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 ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 72-00-00-010-301-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
Subtask 72-00-00-210-176-A ** ON A/C NOT FOR ALL

A. GVI of the Engine Exhaust Area

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

(1) Put the MAT - PROTECTIVE inside the engine exhaust area to protect the inside surfaces.
(2) Visually inspect the Turbine exhaust Case (TEC) assembly for damage.
(a) Use the FLASHLIGHT (or other light source) to look inside the engine exhaust area and the TEC surfaces.
(3) Do a visual examination of the engine exhaust area and examine the parts that follow:

General Visual Inspection (GVI) of the Engine Exhaust Area ** ON A/C NOT FOR ALL

(a) The turbine-exhaust case struts.
(b) The turbine-exhaust-case engine-mount bushing-area.

CAUTION: BEFORE YOU DO THE INSPECTION OF THE LPT 3RD STAGE BLADES, MAKE SURE THAT YOU PUT ON COTTON GLOVES. HAND PERSPIRATION CAN CAUSE DAMAGE TO TITANIUM ALUMINIDE (TiAl) ALLOY BLADES.

(c) Use the GLOVES - COTTON, LINT-FREE, CLEAN to examine the Low Pressure Turbine (LPT) 3rd-stage blades.
(d) The turbine nozzle assembly.
(e) The turbine center body-assembly.

EXAMINE	DAMAGE	DISPOSITION
TEC struts and mount bushing area	Cracks, nicks, dents and bends	Do a GVI of the TEC (Ref. AMM TASK 72-54-00-210-802).
LPT 3rd stage blades	Cracks, nicks, dents and bends	Do a GVI of the LPT (Ref. AMM TASK 72-53-00-220-801).
Collector/Nozzle	Limits to be supplied by airframe manufacturer.
Center body	Limits to be supplied by airframe manufacturer.

Table - Exhaust Area - Inspection Criteria

(4) Remove the MAT - PROTECTIVE.
(5) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 72-00-00-410-256-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 cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL, 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL, 462AR.

Subtask 72-00-00-440-139-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 72-00-00-410-257-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.01 02:47:20 UTC