Operational Check of Pylon Drain Lines in Zones C, G and D

TASK 54-50-00-200-805-A
Operational Check of Pylon Drain Lines in Zones C, G and D

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
FIN: 4020KM2

1. Reason for the Job
Refer to the MPD TASK: 545900-L1
OPERATIONAL CHECK OF PYLON DRAIN LINES IN ZONES C, G AND D.
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
No specific	AR	WARNING NOTICE(S)

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
413BL, 413ET, 415AL, 415BL, 415BR, 415CR, 423ET, 424BR, 425AL, 425BL, 425BR, 425CR, 471BL, 482BR
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)
437AL, 438AR, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 27-50-00-866-009-A	Retraction of the Flaps on the Ground
TASK 27-50-00-866-009-A-01	Retraction of the Flaps/Slats on the Ground
TASK 54-51-21-000-804-A	Removal of the Pylon Lateral Access-Doors
TASK 54-51-21-400-803-A	Installation of the Pylon Lateral Access-Doors
TASK 54-52-11-000-807-A	Removal of the Access Skin Panels
TASK 54-52-11-400-807-A	Installation of the Access Skin Panels
TASK 54-53-11-000-806-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 54-53-11-400-806-A	Installation of the Pylon-to-Wing Access Panels and Doors
TASK 54-54-00-000-804-A	Removal of the Rear Pylon Fairing (RPF)
TASK 54-54-00-400-803-A	Installation of the Rear Pylon Fairing (RPF)
TASK 71-13-00-010-803-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-803-A	Closing of the Fan Cowl Doors
TASK 78-30-00-040-807-A	Deactivation of the Thrust Reverser System for Nacelle Maintenance (ICU)
TASK 78-30-00-440-807-A	Reactivation of the Thrust Reverser System after Nacelle Maintenance (ICU)
TASK 78-36-00-010-806-A	Opening of the Thrust Reverser Cowl Doors
TASK 78-36-00-410-806-A	Closing of the Thrust Reverser Cowl Doors
Drain Lines of Zones C, G and D
Pylon Drainage Zones

3. Job Set-up
Subtask 54-50-00-941-078-A

A. Safety Precautions
(1) On the center pedestal, on ENG panel 115VU:
(a) Make sure that the ENG/MODE selector switch is in the NORM position.
(b) Make sure that the ENG/MASTER 1(2) control switch was in the OFF position not less than five minutes before you do this procedure.
(c) Put the WARNING NOTICE(S) in position to tell persons not to operate the ENG/MODE selector switch and the ENG/MASTER 1(2) control switch.
(2) On the ENG section of maintenance panel 50VU:
(a) Make sure that the ON legend of the FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put the WARNING NOTICE(S) in position to tell persons not to energize FADEC 1(2).
(3) Make sure that the flaps and slats are fully retracted (Ref. AMM TASK 27-50-00-866-009).

Subtask 54-50-00-040-070-A

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 78-30-00-040-807).

Subtask 54-50-00-010-068-A

C. Get Access
(1) Put the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon, at zones 415 and 470
(b) For the right pylon, at zones 425 and 480.
(2) Remove the access skin panels (Ref. AMM TASK 54-52-11-000-807):
(a) For the left pylon: 413BL
(b) For the right pylon: 424BR.
(3) Remove the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-000-806):
(a) For the left pylon: 413ET and 471BL
(b) For the right pylon: 423ET and 482BR.
(4) Open the fan cowl doors (Ref. AMM TASK 71-13-00-010-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

437AL and 438AR.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)

447AL and 448AR.

(5) Open the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-010-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

451AL and 452AR.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)

461AL and 462AR.

(6) Remove the pylon lateral access-doors (Ref. AMM TASK 54-51-21-000-804):
(a) For the left pylon: 415AL 415BL 415BR and 415CR
(b) For the right pylon: 425AL 425BL 425BR and 425CR.
(7) Remove the rear pylon fairing (Ref. AMM TASK 54-54-00-000-804).
(8) Put the CONTAINER 5 L (1.32 USGAL) in position below:
(a) The zone F drain-line outlet
(b) The zone D drain-line outlet.

4. Procedure
Subtask 54-50-00-200-050-A

A. Operational Test

Drain Lines of Zones C, G and D

Pylon Drainage Zones

(1) Do the operational test of the drain lines in zones C, G and D:
(a) Install a plug on the zone D drain-line outlet.
(b) Put water in the zone A drainage to fill the zone A drain lines:

Make sure that the water flows freely from the zone A drain-line outlet.
Then, install a plug on the zone A drain-line outlet and stop the water supply when the drain line is full.

Make sure that the water flows freely from the zone F drain-line outlet.
Then, install a plug on the zone F drain-line outlet and stop the water supply when the drain line is full.

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

(d) Make sure that there is no leakage along the drain lines from the drain line connections to the drain line outlet. If necessary, use the FLASHLIGHT and the MIRROR - INSPECTION, FLEXIBLE.
(e) Remove the plug from the zone A drain-line outlet.
(f) Drain the water from the zone A drain-line outlet.
(g) Remove the plug from the zone F drain-line outlet.
(h) Drain the water from the zone F drain-line outlet.
(i) Remove the plug from the zone D drain-line outlet.
(j) Drain the water.

5. Close-up
Subtask 54-50-00-410-070-A

A. Close Access
(1) Remove the CONTAINER 5 L (1.32 USGAL).
(2) Install the rear pylon fairing (Ref. AMM TASK 54-54-00-400-803).
(3) Install the pylon lateral access-doors (Ref. AMM TASK 54-51-21-400-803):
(a) For the left pylon: 415AL 415BL 415BR and 415CR
(b) For the right pylon: 425AL 425BL 425BR and 425CR.
(4) Close the thrust-reverser cowl doors (Ref. AMM TASK 78-36-00-410-806):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

451AL and 452AR.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)

461AL and 462AR.

(5) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-803):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENGINE 1)

437AL and 438AR.

(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENGINE 2)

447AL and 448AR.

(6) Install the pylon-to-wing access panels and doors (Ref. AMM TASK 54-53-11-400-806):
(a) For the left pylon: 413ET and 471BL
(b) For the right pylon: 423ET and 482BR.
(7) Install the access skin panels (Ref. AMM TASK 54-52-11-400-807):
(a) For the left pylon: 413BL
(b) For the right pylon: 424BR.

Subtask 54-50-00-440-066-A

B. Reactivation of the Thrust Reverser
(1) Make the thrust reverser serviceable after maintenance (Ref. AMM TASK 78-30-00-440-807).

Subtask 54-50-00-942-061-A

C. Aircraft Maintenance Configuration
(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 01:59:17 UTC