W DOC AIRBUS | AMM A320F

Installation of the NEA Line in the Fuel Center Tank

TASK 47-20-49-400-801-A
Installation of the NEA Line in the Fuel Center Tank

WARNING: YOU MUST OBEY ALL THE SAFETY PROCEDURES WHEN YOU DO WORK IN OR NEAR THE FUEL TANK. IF YOU DO NOT OBEY THE SAFETY PROCEDURES, THERE IS A RISK OF:
  • DEATH OR INJURY TO PERSONS
  • DAMAGE TO THE AIRCRAFT OR OTHER 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: MAKE SURE THAT THE SAFETY DEVICES AND THE WARNING NOTICES ARE IN POSITION BEFORE YOU START A TASK ON OR NEAR:
  • THE FLIGHT CONTROLS
  • THE FLIGHT CONTROL SURFACES
  • THE LANDING GEAR AND RELATED DOORS
  • COMPONENTS THAT MOVE.
MOVEMENT OF COMPONENTS CAN KILL OR CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.
WARNING: YOU MUST WEAR SAFETY BREATHING EQUIPMENT WHEN YOU DO WORK IN THIS AREA. THIS AREA CAN CONTAIN AIR FROM THE TANK INERTING SYSTEM. AIR FROM THIS SYSTEM HAS A LOW-OXYGEN CONTENT AND CAN CAUSE INJURY AND DEATH.
WARNING: MAKE SURE THAT:
  • THERE ARE NO CAPS OR COVERS ON THE FUEL TANK VENTILATION DUCTS. CAPS OR COVERS WILL CAUSE OVERPRESSURE OR UNDERPRESSURE DAMAGE TO THE FUEL TANK.
  • NO PERSONS ARE NEAR THE FUEL TANK OR VENTILATION DUCTS OF THE FUEL TANK.
ZONE: 141
1. Reason for the Job
Self explanatory
2. Job Set-up Information
 A. Fixtures, Tools, Test and Support Equipment
REFERENCE
QTY
DESIGNATION
No specific
1
ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific
AR
CAP - 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 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T
No specific
Torque wrench: range to between 5.3 and 4.8 m.daN (39.09 and 35.40 lbf.ft ) T
 B. Consumable Materials
REFERENCE
DESIGNATION
(Material No.04DAB2)
Primer Epoxy Paint-- Corrosion Inhibiting Structure
(Material No.04TMB2)
Varnish-- Electrical Bonding Structure
 C. Work Zones and Access Panels
ZONE/ACCESS
ZONE DESCRIPTION
141
WING CENTER BOX
148AZ
 D. Referenced Information
REFERENCE
DESIGNATION
TASK 12-11-28-650-003-A
Pressure Refuel with Automatic Control
TASK 20-21-11-911-001-A
Tightening Torques for Standard Threaded Fasteners
TASK 20-28-00-912-802-A
Electrical Bonding - General Maintenance Procedure
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 28-10-00-910-002-A
Access to the Fuel Tanks and the Work Areas
TASK 28-25-00-650-001-A
Pressure Defuel
TASK 28-25-00-650-003-A
To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-650-003-A-01
To Drain Remaining Fuel from the Wing Tanks and the Center Tank
TASK 28-25-00-869-001-A
Fuel Transfer
TASK 57-17-11-000-001-A
Removal of Access Cover 147AZ(148AZ)
TASK 57-17-11-000-001-B
Removal of Access Cover 148AZ or/and the ACT-Equipment Support Door
TASK 57-17-11-400-001-A
Installation of Access Cover 147AZ(148AZ)
TASK 57-17-11-400-001-B
Installation of Access Cover 148AZ or/and the ACT-Equipment Support-Door
F NEA line - Center Tank
3. Job Set-up
Subtask 47-20-49-941-055-A ** ON A/C NOT FOR ALL
A. Safety Precautions
   (1) Put the SAFETY BARRIER(S) in position.
WARNING: BEFORE YOU DO WORK IN OR NEAR A FUEL TANK, MAKE SURE THAT YOU OBEY ALL THE SAFETY PROCEDURES. THIS WILL PREVENT INJURY TO PERSONS AND/OR DAMAGE TO THE AIRCRAFT.
   (2) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
   (3) Put the WARNING NOTICE(S) in position:
  • On the HYD/FUEL control panel 40VU, to tell persons not to operate the fuel system
  • On the refuel/defuel control panel 800VU/801VU, to tell persons not to refuel the aircraft.
Subtask 47-20-49-860-056-A ** ON A/C NOT FOR ALL
B. Aircraft Maintenance Configuration
   (1) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
Subtask 47-20-49-865-056-A ** ON A/C NOT FOR ALL
C. Open, safety and tag this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUIGGS/CTRL7YAN28
** ON A/C NOT FOR ALL
121VUIGGS/CTRL7YAP28
** ON A/C NOT FOR ALL
122VUCSAS / CTRL1HWU17
Subtask 47-20-49-650-051-A ** ON A/C NOT FOR ALL
D. Fuel Configuration
   (1) Defuel the center tank (Ref. AMM TASK 28-25-00-650-001) or move the fuel into a different tank (Ref. AMM TASK 28-25-00-869-001).
   (2) Drain the remaining fuel from the center tank (Ref. AMM TASK 28-25-00-650-003).
   (3) On the defuel/refuel control panel 800VU, make sure that:
  • All the valve control switches are set to the SHUT position.
  • The MODE SELECT switch is set to OFF position.
Subtask 47-20-49-010-055-A ** ON A/C NOT FOR ALL
E. Get Access
   (1) Put an ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE at Zone 142.
   (2) Get access to the center tank (Ref. AMM TASK 28-10-00-910-002).
   (3) Remove the access panel 148AZ (Ref. AMM TASK 57-17-11-000-001).
4. Procedure
WARNING: DO NOT GO INTO THE WORK AREA UNTIL A MINIMUM OF 5 MINUTES AFTER YOU REMOVE THE ACCESS PANEL. LET AIR FLOW THROUGH THE WORK AREA. AIR FROM THIS SYSTEM HAS A LOW OXYGEN CONTENT AND CAN CAUSE INJURY OR DEATH.
Subtask 47-20-49-420-051-A ** ON A/C NOT FOR ALL
A. Installation of the NEA line
NOTE: Two persons are necessary to do this procedure.
   (1) To install the NEA pipe (2):
     (a) Remove CAP - BLANKING from the disconnected pipe ends.
     (b) Install the clamps (52), (72) on the support brackets (51), (70) with the bolts (53), (75) and the washers (54), (76).
     (c) Tighten the bolts (53), (75) (Ref. AMM TASK 20-21-11-911-001).
     (d) Apply Primer Epoxy Paint-- Corrosion Inhibiting Structure (Material No.04DAB2) on the bolts (53) and (75).
     (e) Install NEA pipe (2) on the union (85) and tighten the nut (84).
     (f) TORQUE the nut (84) to between 5.3 and 4.8 m.daN (39.09 and 35.40 lbf.ft ) T.
     (g) Install the screw (82) and the nut (81) on the clamp (83) and tighten the nut (81).
     (h) TORQUE the nut (81) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (i) Attach the bonding lead (79) to the clamp (83) with the self-locking nut (80) (Ref. AMM TASK 20-28-00-912-802).
     (j) TORQUE the self-locking nut (80) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (k) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) to the screw (82), the nut (81) and the self-locking nut (80).
     (l) Install the screw (78) and the nut (74) on the clamp (77) and tighten the nut (74).
     (m) TORQUE the nut (74) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (n) Attach the bonding lead (71) to the clamp (77) with the self-locking nut (73) (Ref. AMM TASK 20-28-00-912-802).
     (o) TORQUE the self-locking nut (73) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (p) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) to the screw (78), the nut (74) and the self-locking nut (73).
     (q) Install the screw (40) and the nut (50) on the clamp (41) and tighten the nut (50).
     (r) TORQUE the nut (50) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (s) Attach the bonding lead (48) to the clamp (41) with the self-locking nut (49). (Ref. AMM TASK 20-28-00-912-802).
     (t) TORQUE the self-locking nut (49) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (u) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) to the screw (40), the nut (50) and the self-locking nut (49).
   (2) To install the NEA pipe (1):
     (a) Remove CAP - BLANKING from the disconnected pipe ends.
     (b) Install the clamps (7), (12) on the support brackets (6), (11) with the bolts (8), (16) and the washers (9), (15).
     (c) Tighten the bolts (8), (16) (Ref. AMM TASK 20-21-11-911-001).
     (d) Apply Primer Epoxy Paint-- Corrosion Inhibiting Structure (Material No.04DAB2) on the bolts (8) and (16).
     (e) Install NEA pipe (1) on the union (42) with the nut (43).
     (f) TORQUE the nut (43) to between 5.3 and 4.8 m.daN (39.09 and 35.40 lbf.ft ) T.
     (g) Install the screw (44) and the nut (45) on the clamp (47) and tighten the nut (45).
     (h) TORQUE the nut (45) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (i) Attach the bonding lead (48) to the clamp (47) with the self-locking nut (46) (Ref. AMM TASK 20-28-00-912-802).
     (j) TORQUE the self-locking nut (46) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (k) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) on the screw (44), the nut (45) and the self-locking nut (46).
     (l) Install the screw (13) and the nut (17) on the clamp (14) and tighten the nut (17).
     (m) TORQUE the nut (17) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (n) Attach the bonding lead (10) to the clamp (14) with the self-locking nut (18) (Ref. AMM TASK 20-28-00-912-802).
     (o) TORQUE the nut (18) to between 0.48 and 0.37 m.daN (42.48 and 32.74 lbf.in ) T.
     (p) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) on the screw (13), the nut (17) and the self-locking nut (18).
   (3) Do a check of the bonding (Ref. AMM TASK 20-28-00-912-802).
Subtask 47-20-49-865-057-A ** ON A/C NOT FOR ALL
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
PANELDESIGNATIONFINLOCATION
** ON A/C NOT FOR ALL
121VUIGGS/CTRL7YAN28
** ON A/C NOT FOR ALL
121VUIGGS/CTRL7YAP28
** ON A/C NOT FOR ALL
122VUCSAS / CTRL1HWU17
5. Close-up
Subtask 47-20-49-410-051-A ** 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 148AZ (Ref. AMM TASK 57-17-11-400-001).
   (3) Close the related access panels (Ref. AMM TASK 28-10-00-910-002).
   (4) Remove the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE.
Subtask 47-20-49-650-052-A ** ON A/C NOT FOR ALL
B. Fuel Configuration
   (1) Refuel the center tank (Ref. AMM TASK 12-11-28-650-003).
   (2) On the defuel/refuel control panel 800VU, make sure that:
  • All the valve control switches are set to the OPEN position
  • the MODE SELECT switch is set to the REFUEL position.
Subtask 47-20-49-942-051-A ** ON A/C NOT FOR ALL
C. Removal of Equipment
   (1) Remove the WARNING NOTICE(S).
   (2) Remove the SAFETY BARRIER(S).
   (3) Remove all the fixtures, tools, test and support equipment used during this procedure.
[Rev.10 from 2021] 2026.04.02 06:26:18 UTC
"WTRUIB" 2025