General Visual Inspection (GVI) of the Thrust Reverser Door Opening System (DOS) [PW11]

TASK 78-36-00-200-801-A
General Visual Inspection (GVI) of the Thrust Reverser Door Opening System (DOS)

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: WEAR APPLICABLE PERSONAL PROTECTIVE EQUIPMENT (PPE) WHEN YOU DO THIS TASK. BEFORE YOU USE PPE, READ, UNDERSTAND AND OBEY ALL INSTRUCTIONS FOR ITS USE. THESE INSTRUCTIONS INCLUDE INSTRUCTIONS FROM THE MANUFACTURER, YOUR EMPLOYER AND GOVERNMENT REGULATIONS. YOU CAN GET INJURED IF YOU DO NOT USE PPE. GET INSTRUCTIONS FROM YOUR EMPLOYER ON WHICH PPE IS NECESSARY.

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 2M (6 FT) - ADJUSTABLE

B. Work Zones and Access Panels

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

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 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 78-36-02-000-801-A	Removal of the Thrust Reverser Door Opening System (DOS) Actuator
TASK 78-36-02-400-801-A	Installation of the Thrust Reverser Door Opening System (DOS) Actuator
TASK 78-36-04-000-801-A	Removal of the Thrust Reverser Hold Open Rods (HOR)
TASK 78-36-04-400-801-A	Installation of the Thrust Reverser Hold Open Rods (HOR)
Thrust Reverser Door Opening System (DOS) - General Visual Inspection (GVI)

3. Job Set-up
Subtask 78-36-00-941-062-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 78-36-00-010-097-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 78-36-00-040-073-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).

4. Procedure
Subtask 78-36-00-210-050-A ** ON A/C NOT FOR ALL

A. General Visual Inspection (GVI) of the Thrust Reverser Door Opening System (DOS)

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

(1) Do not discard a part until you are sure there are no repairs available. If you reject a part and no repair is available, contact United Technologies Aerospace Systems (UTAS) for disposition.
(2) Examine the left and right DOS actuators.
(a) Examine the left and right actuators for cracks, holes, gouges and corrosion. If you find damage, replace the actuator or contact UTAS for disposition. (Ref. AMM TASK 78-36-02-000-801) and (Ref. AMM TASK 78-36-02-400-801)
(b) Examine the bolts, bushings, washers and nuts that attach the left and right actuators to the torque box and fitting. Look for cracks, corrosion, wear, other damage and loss of torque. If you find damage or loss of torque, replace the part (Ref. AMM TASK 78-36-02-000-801) and (Ref. AMM TASK 78-36-02-400-801).
(c) Examine the left and right fittings. Look for cracks, gouges, too much wear, corrosion and other damage. If you find damage, replace the fitting or contact UTAS for disposition. (Ref. AMM TASK 78-36-02-000-801) and (Ref. AMM TASK 78-36-02-400-801)
(d) Examine the bolts and washers that attach the left and right fittings to the engine case. Look for cracks, corrosion, wear, other damage and loss of torque. If you find damage or loss of torque, replace the part (Ref. AMM TASK 78-36-02-000-801) and (Ref. AMM TASK 78-36-02-400-801).
(3) Examine the left and right thrust reverser Hold Open Rods (HORs).
(a) Examine the left and right HORs. Look for cracks, holes, gouges, corrosion or other damage. If you find damage, replace the HORs or contact UTAS for disposition. (Ref. AMM TASK 78-36-04-000-801) and (Ref. AMM TASK 78-36-04-400-801).
(b) Examine the hardware that attach the left and right HORs to the torque box. Look for cracks, corrosion, wear, other damage and loss of torque. If you find damage or loss of torque, replace the part. (Ref. AMM TASK 78-36-04-000-801) and (Ref. AMM TASK 78-36-04-400-801).

5. Close-up
Subtask 78-36-00-440-066-A ** ON A/C NOT FOR ALL

A. Reactivation of the Thrust Reserser System
(1) Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 78-36-00-410-083-A ** ON A/C NOT FOR ALL

B. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) 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
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).

[Rev.10 from 2021] 2026.04.02 07:43:36 UTC