Operational Check of Pylon Drainage System in Zone C

TASK 54-50-00-200-803-A
Operational Check of Pylon Drainage System in Zone C

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: PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:

THE FLIGHT CONTROLS
THE FLIGHT CONTROL SURFACES
THE LANDING GEAR AND THE RELATED DOORS
COMPONENTS THAT MOVE.

MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR CAN CAUSE DAMAGE TO THE EQUIPMENT.

ZONE: 410
ZONE: 420
FIN: 4020KM1 ** ON A/C NOT FOR ALL
FIN: 4020KM2 ** ON A/C NOT FOR ALL

1. Reason for the Job
Refer to the MPD TASK: 545900-W2
OPERATIONAL CHECK OF PYLON DRAINAGE SYSTEM IN ZONE C.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	FLASHLIGHT
No specific	AR	MIRROR - INSPECTION, FLEXIBLE

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
410	ENG 1 PYLON BOX AND FORWARD FAIRING
420	ENG 2 PYLON BOX AND FORWARD FAIRING
413ET, 415AL, 415BL, 415BR, 415CR, 423ET, 425AL, 425BL, 425BR, 425CR, 471BL, 482BR
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 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-802-A	Installation of the Pylon Lateral Access-Doors
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-804-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 54-54-00-000-805-A	Removal of the Closing Sheet Metal
TASK 54-54-00-400-804-A	Installation of the Closing Sheet Metal
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 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Pylon Drainage - Zones
Pylon Drainage System in Zone C

3. Job Set-up
Subtask 54-50-00-941-071-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 54-50-00-040-059-A ** ON A/C NOT FOR ALL

B. Deactivation of the Thrust Reverser

WARNING: MAKE SURE THAT THE THRUST REVERSER IS LOCKED. IF NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE INJURY TO PERSONNEL AND/OR DAMAGE TO THE REVERSER.

(1) Make the thrust reverser unserviceable for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 54-50-00-010-061-A ** ON A/C NOT FOR ALL

C. 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) 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.
(3) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, in zone 415
(b) For the right pylon, in zone 425.
(4) Remove the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-000-804):
(a) For the left pylon: 413ET 471BL
(b) For the right pylon: 423ET 482BR.
(5) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-802):
(a) For the left pylon: 415AL 415BL 415BR 415CR
(b) For the right pylon: 425AL 425BL 425BR 425CR.
(6) Remove the closing sheet metal (Ref. AMM TASK 54-54-00-000-805).
(7) Put a CONTAINER 5 L (1.32 USGAL) in position below the zone F drain-line outlet.

4. Procedure
Subtask 54-50-00-210-061-A ** ON A/C NOT FOR ALL

A. Operational Check of the Pylon Drainage System in Zone C

Pylon Drainage - Zones ** ON A/C NOT FOR ALL

Pylon Drainage System in Zone C ** ON A/C NOT FOR ALL

(1) Do the operational check of the pylon drainage system in zone C:
(a) Put a plug in the zone F drain-line outlet in zone D.
(b) Put water in the front and the rear of the zone F drainage to fill the zone F drain lines.

NOTE: To get the most accurate results for the leakage test, the water must stay a minimum of 10 minutes in the drain lines.

(c) Make sure that there is no leakage all along the drain lines from the drain line connections to the drain line outlet. Use a FLASHLIGHT and a MIRROR - INSPECTION, FLEXIBLE, if necessary.
(d) Remove the plug from the zone F drain-line outlet in zone D.

5. Close-up
Subtask 54-50-00-410-060-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the CONTAINER 5 L (1.32 USGAL).
(2) Install the closing sheet metal (Ref. AMM TASK 54-54-00-400-804).
(3) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-802):
(a) For the left pylon: 415AL 415BL 415BR 415CR
(b) For the right pylon: 425AL 425BL 425BR 425CR.
(4) Install the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-400-804):
(a) For the left pylon: 413ET 471BL
(b) For the right pylon: 423ET 482BR.
(5) 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.
(6) 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.

Subtask 54-50-00-440-057-A ** ON A/C NOT FOR ALL

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 54-50-00-942-057-A ** ON A/C NOT FOR ALL

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

[Rev.10 from 2021] 2026.04.01 04:23:32 UTC