Installation of the Fuel Drain Line

TASK 28-20-00-400-801-A
Installation of the Fuel Drain Line

WARNING: BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.

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.

WARNING: BE CAREFUL NOT TO GET AIRCRAFT FUEL IN YOUR MOUTH OR IN YOUR EYES. IF YOU GET FUEL ON YOUR SKIN OR ON YOUR CLOTHES, FLUSH IT IMMEDIATELY WITH WATER. IF NECESSARY, GET MEDICAL HELP. AIRCRAFT FUEL IS POISONOUS.

WARNING: YOU MUST USE THE NECESSARY PRECAUTIONS TO PREVENT INJURY FROM HEAT. THE LOCATION FOR THIS TASK CAN BE VERY HOT.

ZONE: 410
ZONE: 420
ZONE: 470
ZONE: 480

1. Reason for the Job
Self explanatory
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	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.06ABB2)	Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14SBA1)	Textile-Lint free Cotton -

C. 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
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON
413DL, 413ET, 415AL, 415AR, 423ET, 424DR, 425AL, 425AR, 451AL, 451DL, 451EL, 461AL, 461DL, 461EL, 462AR, 462DR, 462ER, 471AL, 481AL

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-21-11-911-001-A	Tightening Torques for Standard Threaded Fasteners
TASK 20-21-12-911-001-A	Tightening Torques for Pipe Unions (not for OXYGEN Unions)
TASK 24-41-00-862-002-A	De-energize the Aircraft Electrical Circuits Supplied from the External Power
TASK 24-41-00-862-002-A-01	De-energize the Aircraft Electrical Circuits Supplied from the APU
TASK 24-41-00-862-002-A-02	De-energize the Aircraft Electrical Circuits Supplied from the Engine 1(2)
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 31-60-00-860-002-A	EIS Stop Procedure
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 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
Fuel Drain Line - Location and Detail

3. Job Set-up
Subtask 28-20-00-941-054-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) Make sure that the fuel safety procedure instructions are obeyed (Ref. AMM TASK 28-00-00-910-001).
(2) Make sure that the SAFETY BARRIER(S) are in position.

Subtask 28-20-00-860-054-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) P/BSW is off.
(2) Make sure that the WARNING NOTICE(S) is in position to tell persons not to energize the FADEC 1(2).

Subtask 28-20-00-865-053-A ** ON A/C NOT FOR ALL

C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-20-00-010-052-B ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position:
(a) For the left pylon at zone 410 and 470.
(b) For the right pylon at zone 420 and 480.
(2) Make sure that the below access panels are opened:
(a) For the left pylon:

413DL, 413ET and 471AL (Ref. AMM TASK 54-53-11-000-804).
415AL and 415AR (Ref. AMM TASK 54-51-21-000-802).

(b) For the right pylon:

423ET and 481AL (Ref. AMM TASK 54-53-11-000-804).
425AL and 425AR (Ref. AMM TASK 54-51-21-000-802).

(3) Make sure that the below thrust reverser cowl-doors are opened:
(a) For the left nacelle:

451AL, 451DL and 451EL (Ref. AMM TASK 78-36-00-010-802).

(b) For the right nacelle:

461AL, 461DL and 461EL (Ref. AMM TASK 78-36-00-010-802)>.

4. Procedure
Subtask 28-20-00-420-052-A ** ON A/C NOT FOR ALL

A. Preparation for Installation
(1) Clean the external surface of the fuel drain line and the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do a visual inspection of the fuel drain line. It must not be blocked.
(3) Remove the PLUG-BLANKING from each disconnected line end.

Subtask 28-20-00-420-051-B ** ON A/C NOT FOR ALL

B. Installation of the Fuel Drain Line
(1) Do the steps that follow to install the flexible hose assembly (7):
(a) Put the flexible hose assembly (7) in position on the RIB 1.
(b) Make sure that the flexible hose assembly (7) is in correct position and aligned correctly.
(c) Carefully connect the flexible hose assembly (7) to the union (6) and the main fuel-feed line.
(d) Tighten the connectors of the flexible hose assembly (7) (Ref. AMM TASK 20-21-12-911-001).
(2) Do the steps that follow to install the pipe assembly (2):
(a) Put the pipe assembly (2) in position between RIB 1 and RIB 4.
(b) Make sure that the pipe assembly (2) is in correct position and aligned correctly.
(c) Connect the pipe assembly (2) to the union (5).
(d) Install the washers (4) and the bolts (3) to the pipe assembly (2).
(e) Tighten the connector of the pipe assembly (2) on the union (5) (Ref. AMM TASK 20-21-12-911-001).
(f) Tighten the bolts (3) (Ref. AMM TASK 20-21-11-911-001).
(g) Apply Polysulfide Sealant-Fuel Tank Fillet 120 degre Celsius (Material No.06ABB2) to the bolts (3).
(3) Do the steps that follow to install the flexible hose assembly (1):
(a) Put the flexible hose assembly (1) in position between RIB 3 and RIB 6.
(b) Make sure that the flexible hose assembly (1) is in correct position and aligned correctly.
(c) Connect the flexible hose assembly (1) to the pipe assembly (2) and the main fuel-feed line.
(d) Tighten the connectors of the flexible hose assembly (1) (Ref. AMM TASK 20-21-12-911-001).

5. Close-up
Subtask 28-20-00-410-053-B ** 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:
(a) For the left nacelle:

451AL, 451DL and 451EL (Ref. AMM TASK 78-36-00-410-802).

(b) For the right nacelle:

462AR, 462DR and 462ER (Ref. AMM TASK 78-36-00-410-802).

(3) Install the applicable access panels:
(a) For the left pylon:

413DL, 413ET and 471AL (Ref. AMM TASK 54-53-11-400-804).
415AL and 415AR (Ref. AMM TASK 54-51-21-000-802).

(b) For the right pylon:

423ET, 424DR and 481AL (Ref. AMM TASK 54-53-11-400-804).
425AL and 425AR (Ref. AMM TASK 54-51-21-400-802).

Subtask 28-20-00-865-054-A ** ON A/C NOT FOR ALL

B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
49VU	FUEL/LP VALVE/MOT1/ENG2	2QG	A09
49VU	FUEL/LP VALVE/MOT1/ENG1	1QG	A08
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-20-00-860-055-B ** ON A/C NOT FOR ALL

C. Aircraft Maintenance Configuration
(1) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(2) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).
(3) Reactivate the thrust reverser system (Ref. AMM TASK 78-30-00-440-805).

Subtask 28-20-00-942-053-A ** ON A/C NOT FOR ALL

D. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

[Rev.10 from 2021] 2026.04.02 06:17:21 UTC