Discard "O" Rings on Pylon Engine Fuel Feed Pipe Connectors and replace by new "O" Rings

TASK 28-20-00-960-803-A
Discard "O" Rings on Pylon Engine Fuel Feed Pipe Connectors and replace by new "O" Rings

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
Refer to the MPD TASK: 282100-07
DISCARD "O" RINGS ON PYLON ENGINE FUEL FEED PIPE CONNECTORS AND REPLACE BY NEW "O" RINGS
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	PLUG - BLANKING
No specific	AR	SAFETY BARRIER(S)
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	AR	WARNING NOTICE(S)
No specific	Torque wrench: range to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.03FAB1)	Mineral Oil base Grease-- Vaseline or Petrolatum -
(Material No.06AAB1)	Polysulfide Sealant-General Purpose Fillet -
(Material No.08BAA9)	Non Aqueous Cleaner-General - -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -
(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
413AL, 413BL, 413CL, 413DT, 423AR, 423BR, 423CR, 423DT, 471AL, 471AR, 471BL, 471BR, 481AL, 481AR, 481BL, 481BR

D. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
14	O-RING	AIPC 28-21-06-01-070
21	O-RING	AIPC 28-21-06-01-070
33	O-RING	AIPC 28-21-06-01-070
4	O-RING	AIPC 28-21-06-01-070
32	O-RING	AIPC 28-21-06-01-100
5	O-RING	AIPC 28-21-06-01-100
26	RETAINING RING	AIPC 28-21-06-01-110
9	RETAINING RING	AIPC 28-21-06-01-110
13	O-RING	AIPC 28-21-06-01-170
22	O-RING	AIPC 28-21-06-01-170
11	RETAINING RING	AIPC 28-21-06-01-180
24	RETAINING RING	AIPC 28-21-06-01-180
43	O-RING	AIPC 28-21-06-02-360
44	O-RING	AIPC 28-21-06-02-370
39	O-RING	AIPC 28-21-06-02-380
49	O-RING	AIPC 28-21-06-02-380

E. Referenced Information

REFERENCE	DESIGNATION
TASK 20-28-00-912-802-A	Electrical Bonding - General Maintenance Procedure
TASK 24-41-00-861-002-A	Energize the Aircraft Electrical Circuits from the External Power
TASK 24-41-00-861-002-A-01	Energize the Aircraft Electrical Circuits from the APU
TASK 24-41-00-861-002-A-02	Energize the Aircraft Electrical Circuits from Engine 1(2)
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 28-21-00-790-002-A	Visual Check of Pipes, Couplings and LP Valve External to Tank From Front Spar to Disconnect Panel For Leaks With Booster Pump On and LP Valve Open
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 54-52-11-000-001-A	Removal of the Pressure Relief Doors
TASK 54-52-11-000-002-B	Removal of the Access Panels
TASK 54-52-11-400-001-A	Installation of the Pressure Relief Doors
TASK 54-52-11-400-002-B	Installation of the Access Panels
TASK 54-53-11-000-002-B	Removal of the Pylon-to-Wing Access Panels
TASK 54-53-11-400-002-B	Installation of the Pylon-to-Wing Access Panels
TASK 71-00-00-710-002-B	Wet Motoring Check
TASK 71-00-00-710-045-A	Test No.1 : Dry Motor Leak Check
TASK 73-11-10-000-004-A	Removal of the Fuel Filter Element
TASK 73-11-10-400-004-A	Installation of the Fuel Filter Element
TASK 73-12-42-000-010-B	Removal of the Fuel Filter Element
TASK 73-12-42-400-010-B	Installation of the Fuel Filter Element
TASK 78-30-00-040-012-A	Deactivation of the Thrust Reverser Hydraulic Control Unit (HCU) for Ground Maintenance
TASK 78-30-00-081-041-B	Make the Thrust Reverser Serviceable after Maintenance
TASK 78-30-00-440-012-A	Re-activation of the Thrust Reverser Hydraulic Control Unit (HCU) after Ground Maintenance
TASK 78-30-00-481-041-B	Make the Thrust Reverser Unserviceable for Maintenance
Pylon Engine-Fuel-Feed-Pipe Seals - Location and Detail

3. Job Set-up
Subtask 28-20-00-941-060-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 28-20-00-860-064-B ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Deactivate the thrust reverser system (Ref. AMM TASK 78-30-00-040-012).
(2) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(3) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
(4) Use external power to energize the aircraft electrical circuits (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 pushbutton switch (P/BSW)
Make sure that the engine LP valves are shown closed (amber cross-line) on the ECAM lower Display Unit (DU).

Subtask 28-20-00-860-064-C ** ON A/C NOT FOR ALL

B. Aircraft Maintenance Configuration
(1) Deactivate the thrust reverser system (Ref. AMM TASK 78-30-00-481-041).
(2) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(3) Put a WARNING NOTICE(S) in position to tell persons not to energize the FADEC 1(2).
(4) Use external power to energize the aircraft electrical circuits (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 pushbutton switch (P/BSW)
Make sure that the engine LP valves are shown closed (amber cross-line) on the ECAM lower Display Unit (DU).

Subtask 28-20-00-865-065-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
121VU	FUEL/LP VALVE/MOT2/ENG2	4QG	M26
121VU	FUEL/LP VALVE/MOT2/ENG1	3QG	M25

Subtask 28-20-00-010-058-B ** ON A/C NOT FOR ALL

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

413AL (Ref. AMM TASK 54-52-11-000-002)
471AL 471AR 471BL and 471BR (Ref. AMM TASK 54-53-11-000-002)
413BL 413CL and 413DT (Ref. AMM TASK 54-52-11-000-001) and (Ref. AMM TASK 54-52-11-000-002).

(b) For the right pylon:

423AR (Ref. AMM TASK 54-52-11-000-002)
481AL 481AR 481BL and 481BR (Ref. AMM TASK 54-53-11-000-002)
423BR 423CR and 423DT (Ref. AMM TASK 54-52-11-000-001) and (Ref. AMM TASK 54-52-11-000-002).

4. Procedure
Subtask 28-20-00-680-053-B ** ON A/C NOT FOR ALL

A. Drain the Fuel from the Pylon Engine-Fuel-Feed-Pipe
(1) Remove the drain plug from the fuel filter housing and drain the fuel from the engine and fuel feed pipe (Ref. AMM TASK 73-11-10-000-004).
(2) When the flow of fuel stops, install the drain plug in the fuel filter housing (Ref. AMM TASK 73-11-10-400-004).

Subtask 28-20-00-680-053-C ** ON A/C NOT FOR ALL

A. Drain the Fuel from the Pylon Engine-Fuel-Feed-Pipe
(1) Remove the drain plug from the fuel-cooled oil cooler and drain the fuel from the engine and fuel feed pipe (Ref. AMM TASK 73-12-42-000-010).
(2) When the flow of fuel stops, install the drain plug in the fuel-cooled oil cooler (Ref. AMM TASK 73-12-42-400-010).

Subtask 28-20-00-020-055-A ** ON A/C NOT FOR ALL

B. Removal of the Pylon Engine-Fuel-Feed-Pipe Seals
(1) Remove the pipe assembly (15) as follows:
(a) Remove the bolt (20) and the nut (16) from the clamp (17).
(b) Move the bonding leads (18) and (19) away from the clamp (17).
(c) Remove the nuts (6) and the bolts (1) from the clamps (2).
(d) Remove the nuts (28) and the bolts (31) from the clamps (29).
(e) Disengage the sleeves (7) and (30) and move them away from the pipe assembly (15).
(f) Remove the pipe assembly (15) from the pipe assemblies (3) and (34).
(g) Remove the sleeves (7) and (30).
(h) Remove and discard the O-rings (4) and (5) from the pipe assembly (3).

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.

(i) Cut, remove and discard the lockwire from:

The nuts (8), (12), (23) and (27)
The connectors (10) and (25).

(j) Loosen the nuts (8), (12), (23) and (27).
(k) Remove the nuts (8) and (27).
(l) Remove and discard the retaining rings (9) and (26).
(m) Remove the connector (10) and the nut (12) from the pipe assembly (15).
(n) Remove and discard the retaining ring (11).
(o) Remove the connector (25) and the nut (23) from the pipe assembly (15).
(p) Remove and discard the retaining ring (24).
(q) Remove and discard the O-rings (13), (14), (21) and (22) from the pipe assembly (15).
(r) Put the PLUG-BLANKING in each disconnected line end.
(2) Remove the pipe assembly (34) as follows:
(a) Remove the bolts (62) and disconnect the bonding lead (18) from the pipe assembly (34).
(b) Remove the bolts (42) and the washers (41) and disconnect the bonding lead (40) from the pipe assembly (34).
(c) Remove the pipe assembly (34) from RIB9.
(d) Remove the sealant from the mating surfaces of the pipe assembly (34) and RIB9.
(e) Clean the mating surfaces of the pipe assembly (34).
(f) Remove and discard the O-rings (32), (33), (43) and (44) from the pipe assembly (34).
(g) Put the PLUG-BLANKING in each disconnected line end.
(3) Remove the pipe assembly (35) between RIB5 and RIB9 as follows:
(a) Remove the bolts (45) and (60) and the nuts (38) and (50) from the pipe assembly (35).
(b) Move the bonding leads (46) and (59) away from the pipe assembly (35).
(c) Remove the nut (48) and the bolt (36) from the clamp (47).
(d) Remove the nut (56) and the bolt (53) from the clamp (55).
(e) Remove the nut (58) and the bolt (52) from the clamp (57).
(f) Remove the bushings (37), (51) and (54) from the pipe assembly (35).
(g) Carefully remove the pipe assembly (35).
(h) Remove and discard the O-rings (39) and (49) from the pipe assembly (35).
(i) Put the PLUG-BLANKING in each disconnected line end.

Subtask 28-20-00-410-059-A ** ON A/C NOT FOR ALL

C. Preparation for Installation
(1) Clean the component interface and/or the adjacent area with a Textile-Lint free Cotton - (Material No.14SBA1) made moist with Non Aqueous Cleaner-General - - (Material No.08BAA9) .
(2) Do an inspection of the component interfaces and the adjacent area.
(3) Do a visual inspection of the fuel pipes to make sure that there is no blockage.

NOTE: The damage limits for the fuel pipes and the fuel line shrouds are given in the Fuel Pipe Repair Manual (Ref. FPRM Check) and (Ref. FPRM Description).

Subtask 28-20-00-420-057-A ** ON A/C NOT FOR ALL

D. Installation of the Pylon Engine-Fuel-Feed-Pipe Seals
(1) Install the pipe assembly (35) between RIB 5 and RIB 9 as follows:
(a) Lubricate the new O-rings that follow with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(b) Install the O-rings (39) and (49) in their correct position on the pipe assembly (35).
(c) Install the pipe assembly (35) between RIB 5 and RIB 9.
(d) Install the bushings (37), (51) and (54) on the pipe assembly (35):

Make sure that the bushings are installed between the clamps and the pipe assembly (35).

(e) Attach the ends of the clamp (47) with the bolt (36) and the nut (48).
(f) Attach the ends of the clamp (55) with the bolt (53) and the nut (56).
(g) Attach the ends of the clamp (57) with the bolt (52) and the nut (58).
(2) Install the pipe assembly (34) as follows:
(a) Lubricate the new O-rings that follow with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(b) Install the O-rings (32), (33), (43) and (44) in their correct position on the pipe assembly (34).
(c) Apply a layer of Polysulfide Sealant-General Purpose Fillet - (Material No.06AAB1) to the mating surfaces of the pipe assembly (34) and the structure.
(d) Install the pipe assembly (34) on the pipe assembly (35).
(e) Make sure that distance "B" between the ends of the pipe assemblies (35) and (61) is 5 +2 mm or -2 mm (0.1969 +0.0787 in. or -0.0787 in.):
1 Measure the distance of the pipe assembly (35) movement as follows:
a Move the pipe assembly (35) in one direction until it touches the shoulder on the inner side of the related connector.
b Move the pipe assembly (35) fully in the opposite direction until it touches the shoulder on the inner side of the opposite-side related connector.
c The movement must be between 6 mm (0.2362 in.) and 14 mm (0.5512 in.).
d Put each pipe assembly in the middle position between the two related connectors.
(f) Make sure that distance "B" between the ends of the pipe assemblies (34) and (35) is 5 +2 mm or -2 mm (0.1969 +0.0787 in. or -0.0787 in.):
1 Measure the distance of the pipe assembly (35) movement as follows:
a Move the pipe assembly (35) in one direction until it touches the shoulder on the inner side of the related connector.
b Move the pipe assembly (35) fully in the opposite direction until it touches the shoulder on the inner side of the opposite-side related connector.
c The movement must be between 6 mm (0.2362 in.) and 14 mm (0.5512 in.).
d Put each pipe assembly in the middle position between the two related connectors.
(g) TORQUE the nuts (48), (56) and (58) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )

.
(h) Attach the pipe assembly (34) and the bonding lead (40) on RIB 9 with the bolts (42) and the washers (41) (Ref. AMM TASK 20-28-00-912-802).
(i) Attach the pipe assembly (34) and the bonding lead (18) on the bracket (63) with the bolts (62) (Ref. AMM TASK 20-28-00-912-802).
(3) Attach the bonding lead (46) to the pipe assembly (35) with the bolt (45) and the nut (38) (Ref. AMM TASK 20-28-00-912-802).
(4) Attach the bonding lead (59) to the pipe assembly (35) with the bolt (60) and the nut (50) (Ref. AMM TASK 20-28-00-912-802).
(5) TORQUE the nuts (38) and (50) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )

.
(6) Install the pipe assembly (15) as follows:
(a) Lubricate the new O-rings that follow with Mineral Oil base Grease-- Vaseline or Petrolatum - (Material No.03FAB1) :

(b) Install the O-rings (4) and (5) in their correct position on the pipe assembly (3).
(c) Install the O-rings (13), (14), (21) and (22) in their correct position on the pipe assembly (15).
(d) Install the nuts (12) and (23), a new AIPC 28-21-06-01-180 RETAINING RING (11) and a new AIPC 28-21-06-01-180 RETAINING RING (24) on the pipe assembly (15).
(e) Put the connectors (10) and (25) on the pipe assembly (15):

Move the connectors to a short distance up and down from the pipe assembly to install the O-rings correctly.

(f) Put the pipe assembly (15) in position between the pipe assemblies (3) and (34):

Make sure that distance "A" between the ends of the pipes is 5 +3 mm or -3 mm (0.1969 +0.1181 in. or -0.1181 in.):

1 Measure the distance of the pipe assembly (15) movement as follows:
a Move the pipe assembly (15) in one direction until it touches the shoulder on the inner side of the related connector.
b Move the pipe assembly (15) fully in the opposite direction until it touches the shoulder on the inner side of the opposite-side related connector.
c The total movement must be between 4 mm (0.1575 in.) and 16 mm (0.6299 in.).
d Put each pipe assembly in the middle position between the two related connectors.
(g) Install the nut (8) and the new AIPC 28-21-06-01-110 RETAINING RING (9) on the connectors (10).
(h) Install the nut (27) and the new AIPC 28-21-06-01-110 RETAINING RING (26) on the connector (25).
(i) Tighten the nuts (8), (12), (23) and (27) with your hands.

(j) Use 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - to safety the nuts (8) and (12) with the connector (10).
(k) Use 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy - to safety the nuts (23) and (27) with the connector (25).
(l) Put the sleeves (7) and (30) on the pipe assembly (15):

Move the sleeves to a short distance up and down from the pipe assembly to install the O-rings correctly.

(m) Install the clamps (2) with the bolts (1) and the nuts (6).
(n) Install the clamps (29) with the bolts (31) and the nuts (28).
(o) Attach the bonding leads (18) and (19) to the clamp (17) with the bolt (20) and the nut (16) (Ref. AMM TASK 20-28-00-912-802).
(p) TORQUE the nut (16) to between 0.4 and 0.3 m.daN (35.40 and 26.55 lbf.in )

Subtask 28-20-00-210-054-B ** ON A/C NOT FOR ALL

E. Visual Check
(1) Do a dry motor leak check to make sure that there are no fuel leaks (Ref. AMM TASK 71-00-00-710-045).
(2) Do a visual check of the pylon fuel feed pipe to make sure that there are no fuel leaks (Ref. AMM TASK 28-21-00-790-002).

Subtask 28-20-00-210-054-C ** ON A/C NOT FOR ALL

E. Visual Check
(1) Do a wet motor check to make sure that there are no fuel leaks (Ref. AMM TASK 71-00-00-710-002).
(2) Do a visual check of the pylon fuel feed pipe to make sure that there are no fuel leaks (Ref. AMM TASK 28-21-00-790-002).

5. Close-up
Subtask 28-20-00-410-060-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) Install the applicable access panels:
(a) For the left pylon:

413AL (Ref. AMM TASK 54-52-11-400-002)
471AL 471AR 471BL and 471BR (Ref. AMM TASK 54-53-11-400-002)
413BL 413CL and 413DT (Ref. AMM TASK 54-52-11-400-001) and (Ref. AMM TASK 54-52-11-400-002).

(b) For the right pylon:

423AR (Ref. AMM TASK 54-52-11-400-002)
481AL 481AR 481BL and 481BR (Ref. AMM TASK 54-53-11-400-002)
423BR 423CR and 423DT (Ref. AMM TASK 54-52-11-400-001) and (Ref. AMM TASK 54-52-11-400-002).

Subtask 28-20-00-865-066-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 28-20-00-860-065-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 78-30-00-440-012).

Subtask 28-20-00-860-065-C ** ON A/C NOT FOR ALL

Subtask 28-20-00-942-057-A ** ON A/C NOT FOR ALL

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

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