Removal of the Pylon Engine Fuel-Feed-Pipes

TASK 28-20-00-000-803-A
Removal of the Pylon Engine Fuel-Feed-Pipes

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.

WARNING: YOU MUST PUT ON AND ATTACH A SAFETY HARNESS BEFORE YOU START WORK:

ON THE THS OR IN THE REAR FUSELAGE
ON TOP OF THE WINGS OR PYLONS.

WITHOUT A SAFETY HARNESS, YOU CAN FALL. THIS CAN KILL YOU OR CAUSE YOU INJURY.

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	CONTAINER 3 L(3/4 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
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
470	ENGINE 1 AFT PYLON
480	ENGINE 2 AFT PYLON
411AL, 413DL, 413ET, 415AL, 415AR, 423ET, 424DR, 425AL, 425AR, 452AR, 452DR, 452ER, 462AR, 462DR, 462ER, 471AL, 472AR, 482AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 28-00-00-910-001-A	Fuel Safety Procedures
TASK 28-16-42-000-001-A	Removal of the Fuel Recirculation Check-valve
TASK 28-20-00-000-801-A	Removal of the Fuel Drain Line
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 36-11-42-000-802-A	Removal of the Bleed-Air Precooler Exchanger
TASK 36-11-54-000-802-A	Removal of the Fan Air-Valve Actuator
TASK 54-51-21-000-802-A	Removal of the Pylon Lateral Access-Doors
TASK 54-53-11-000-804-A	Removal of the Pylon-to-Wing Access Panels and Doors
TASK 73-11-06-000-801-A	Removal of the Fuel Filter Element
TASK 73-11-06-400-801-A	Installation of the Fuel Filter Element
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors

3. Job Set-up
Subtask 28-20-00-941-057-A ** ON A/C NOT FOR ALL

A. Safety Precautions

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

(1) You must obey the fuel safety procedures when you do work on the fuel system (Ref. AMM TASK 28-00-00-910-001).
(2) As necessary, use the applicable SAFETY BARRIERS, specified by the operator's instructions and your local regulations.

Subtask 28-20-00-860-059-A ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Deactivate the thrust reverser system (Ref. AMM TASK 78-30-00-040-805).
(2) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) P/BSW is off.
(3) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
(4) Energize the aircraft electrical circuits from the external power (Ref. AMM TASK 24-41-00-861-002).
(5) Do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001), then:

On the ECAM control panel (CP), push in the FUEL push button switch (P/BSW)
Make sure that the engine LP valves are shown closed (amber cross-line) on the ECAM lower display unit (DU).

Subtask 28-20-00-865-060-A ** ON A/C NOT FOR ALL

C. Open, safety and tag 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
49VU	ENGINE/2/HP FUEL SOV	1KC2	A02
49VU	ENGINE/1/HP FUEL SOV	1KC1	A01
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-20-00-010-055-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the applicable thrust reverser cowl-doors:
(a) For the left nacelle:

452ER, 452DR and 452AR (Ref. AMM TASK 78-36-00-010-802).

(b) For the right nacelle:

462ER, 462DR and 462AR (Ref. AMM TASK 78-36-00-010-802).

(2) Put an ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE in position:
(a) For the left pylon at the zone 410 and 470.
(b) For the right pylon at the zone 420 and 480.
(3) Remove the applicable access panels:
(a) For the left pylon:

413ET, 413DL, 471AL and 472AR (Ref. AMM TASK 54-53-11-000-804).
415AR and 415AL (Ref. AMM TASK 54-51-21-000-802).

(b) For the right pylon:

411AL, 423ET, 424DR and 482AR (Ref. AMM TASK 54-53-11-000-804).
425AR and 425AL (Ref. AMM TASK 54-51-21-000-802).

(4) Remove the bellows and its muffler (Ref. AMM TASK 36-11-42-000-802).

4. Procedure
Subtask 28-20-00-680-051-A ** ON A/C NOT FOR ALL

A. Drain the Fuel from the Pylon Engine Fuel-Feed-Pipes
(1) Remove the drain plug from the fuel filter housing and drain the fuel from the engine and the pylon engine fuel-feed-pipes (Ref. AMM TASK 73-11-06-000-801).
(2) When the flow of fuel stops, install the drain plug in the fuel filter housing (Ref. AMM TASK 73-11-06-400-801).

Subtask 28-20-00-020-053-A ** ON A/C NOT FOR ALL

B. Removal of the Pylon Engine Fuel-Feed-Pipes
(1) Removal of the pipe (46):
(a) Remove the bellows and its thermal protection (Ref. AMM TASK 36-11-42-000-802).
(b) Put a CONTAINER 3 L(3/4 USGAL) in position below the fuel connections.
(c) Disconnect the fuel recirculation check-valve from its connection adjacent to RIB7 of the pylon box (Ref. AMM TASK 28-16-42-000-001).
(d) Remove the nuts (45) and the bolts (43) from the clamps (44).
(e) Disconnect the bonding leads (42) from the clamps (44).
(f) Remove the clamps (44) from the pipe (46).
(g) Remove the nuts (41), the bolts (37), the washers (38) and the clamps (39) from the sleeves (40) and (47).
(h) Disengage the sleeves (40) and (47) from the pipe assemblies (1) and (31).
(i) Move the sleeves (40) and (47) on the pipe (46).
(j) Remove the connectors (36) from the pipe (46).
(k) To remove the pipe (46) from the pipe assemblies (1) and (31):

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

1 Cut, remove and discard the lockwire from the nuts (33) and the connectors (36).
2 Loosen and remove the nuts (33).
3 Remove the pipe (46) from the pipe assemblies (1) and (31).
4 Remove and discard the retaining rings (34).
5 Remove and discard the O-rings (32) and (35).
6 Put the PLUG-BLANKING in each disconnected line end.
(2) Removal of the pipe assembly (1):
(a) Disconnect the fuel-drain flexible hose (5) from the pipe assembly (1) (Ref. AMM TASK 28-20-00-000-801).
(b) Remove the bolts (2), the washers (3), the nuts (17) and the shim (20).
(c) Remove the bolts (15), the washers (16), the nuts (19) and the shim (18).
(d) Remove and discard the lockwire from the nut (21).
(e) Loosen and remove the nut (21).
(f) Remove and discard the retaining ring (22).
(g) Disengage the sleeve (23) and move it away on the pipe assembly (1).
(h) Remove and discard the lockwire from the nut (25).
(i) Loosen and remove the nut (25).
(j) Remove and discard the retaining ring (26).
(k) Carefully remove the pipe assembly (1) from the pipe assembly (4).
(l) Remove and discard the O-rings (24) and (27).
(m) Remove and discard the O-ring (28).
(n) Put the PLUG-BLANKING in each disconnected line end.
(3) Removal of the pipe (9):
(a) Remove the bolts (7) and the washers (8) from the plate assembly.
(b) Remove the nuts (14), the bolts (10) and the washers (11) that attach the pipe assembly (9) to the pipe assembly (4).
(c) Remove the pipe (9) from the plate assembly.
(d) Put the PLUG-BLANKING in each disconnected line end.
(4) Removal of the pipe assembly (4):
(a) Disconnect the fuel-drain flexible hose (5) from the pipe assembly (4) (Ref. AMM TASK 28-20-00-000-801).
(b) Remove the fan air valve-actuator 9HA1(9HA2) (Ref. AMM TASK 36-11-54-000-802).
(c) Remove the bolts (29) and the washers (30).
(d) Remove the bolts (12) and the washers (13) that attach the pipe assembly (4) to the forward lateral panel.
(e) Remove and discard the gasket (6).

CAUTION: IF THERE ARE FUEL LEAKS, REPLACE THE PIPE ASSEMBLY. DO NOT DISASSEMBLE IT. IF YOU DO, DAMAGE CAN OCCUR WHEN YOU INSTALL THE PIPE ASSEMBLY AGAIN.

(f) Carefully remove the pipe assembly (4) from the pylon.
(g) Put the PLUG-BLANKING in each disconnected line end.

[Rev.10 from 2021] 2026.04.01 00:03:57 UTC