DOC AIRBUS | AMM A320FInstallation of the IGGS In-Tank Housing
TASK 47-20-41-400-001-A
Installation of the IGGS In-Tank Housing
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Expendable Parts
E. Referenced Information
3. Job Set-up
Subtask 47-20-41-941-051-A ** ON A/C NOT FOR ALL
Subtask 47-20-41-420-050-A ** ON A/C NOT FOR ALL
(2) Hold the IGGS in-tank housing (3) in position and install the nuts (1).
(3) TORQUE the nuts (1) to between 0.80 and 0.70 m.daN (70.80 and 61.95 lbf.in )
.
(4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the union (6) on the IGGS in-tank housing (3) (Ref. AMM TASK 20-21-12-911-001).
(6) Install the bonding lead (5) with the screw (4) (Ref. AMM TASK 20-28-00-912-802).
(7) Install the bonding lead (7) with the screw (8) (Ref. AMM TASK 20-28-00-912-802).
(8) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) on the screw heads (4) and (8).
(9) Install the dual-flapper check valve (Ref. AMM TASK 47-20-43-400-001).
Subtask 47-20-41-865-052-A ** ON A/C NOT FOR ALL
Subtask 47-20-41-410-050-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.02 06:26:18 UTC
Installation of the IGGS In-Tank Housing
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.
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:
1. Reason for the Job- 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.
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 | SAFETY BARRIER(S) |
| No specific | Torque wrench: range to between 0.80 and 0.70 m.daN (70.80 and 61.95 lbf.in ) |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.04TMB2) | Varnish-- Electrical Bonding Structure |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 141 | WING CENTER BOX |
| FIG.ITEM | DESIGNATION | IPC-CSN |
|---|---|---|
| 2 | O-RING | AIPC 47-20-04-01-130 |
| 2 | O-RING | AIPC 47-20-84-01-120 |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 20-21-12-911-001-A | Tightening Torques for Pipe Unions (not for OXYGEN Unions) |
| 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 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 28-10-00-910-003-A | Safety Procedures When You Do Work in a Dry Fuel Tank |
| 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 47-20-43-400-001-A | Installation of the Dual-Flapper Check Valve |
| TASK 47-31-34-740-001-A | BITE Test of the IGGS with Bleed Air |
| TASK 47-31-34-740-001-A-01 | BITE Test of the IGGS without Bleed Air |
IGGS In-Tank Housing - Location and DetailSubtask 47-20-41-941-051-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(2) Make sure that the SAFETY BARRIER(S) are in position.
Subtask 47-20-41-860-051-A ** ON A/C NOT FOR ALL 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.
(1) You must obey the fuel safety procedures when you do work in the fuel tank (Ref. AMM TASK 28-10-00-910-003). (2) Make sure that the SAFETY BARRIER(S) are in position.
B. Aircraft Maintenance Configuration
(1) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
Subtask 47-20-41-865-051-A ** ON A/C NOT FOR ALL (1) Make sure that the aircraft electrical circuits are de-energized (Ref. AMM TASK 24-41-00-862-002).
C. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:
Subtask 47-20-41-650-051-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | N28 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | P28 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | CSAS / CTRL | 1HW | U17 |
D. Fuel Configuration
(1) Make sure that the center tank is defueled (Ref. AMM TASK 28-25-00-650-001) (Ref. AMM TASK 28-25-00-650-003).
Subtask 47-20-41-010-051-A ** ON A/C NOT FOR ALL (1) Make sure that the center tank is defueled (Ref. AMM TASK 28-25-00-650-001) (Ref. AMM TASK 28-25-00-650-003).
E. Get Access
(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the zone 142.
(2) Get access to the center tank (Ref. AMM TASK 28-10-00-910-002).
4. Procedure(1) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the zone 142.
(2) Get access to the center tank (Ref. AMM TASK 28-10-00-910-002).
Subtask 47-20-41-420-050-A ** ON A/C NOT FOR ALL
CAUTION:
BE CAREFUL WHEN YOU TOUCH THIS ASSEMBLY. IT HAS PRECISION- TOLERANCE COMPONENTS WITH VERY POLISHED SURFACES. IF YOU ARE NOT CAREFUL, IT IS VERY EASY TO CAUSE DAMAGE TO THESE COMPONENTS (INTERNAL CONTAMINATION, EXTERNAL IMPACT DAMAGE).
A. Installation of the IGGS In-Tank Housing NOTE: Two persons are necessary to do this procedure. One person is in the center tank to hold the IGGS in-tank housing. The other person is on top of the center tank to install the attaching parts.
(1) Install the new AIPC 47-20-04-01-130 O-RING (2) or AIPC 47-20-84-01-120 O-RING (2) on the IGGS in-tank housing (3). (2) Hold the IGGS in-tank housing (3) in position and install the nuts (1).
(3) TORQUE the nuts (1) to between 0.80 and 0.70 m.daN (70.80 and 61.95 lbf.in )
. (4) Remove the PLUG-BLANKING from each disconnected line end.
(5) Install the union (6) on the IGGS in-tank housing (3) (Ref. AMM TASK 20-21-12-911-001).
(6) Install the bonding lead (5) with the screw (4) (Ref. AMM TASK 20-28-00-912-802).
(7) Install the bonding lead (7) with the screw (8) (Ref. AMM TASK 20-28-00-912-802).
(8) Apply Varnish-- Electrical Bonding Structure (Material No.04TMB2) on the screw heads (4) and (8).
(9) Install the dual-flapper check valve (Ref. AMM TASK 47-20-43-400-001).
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 47-20-41-790-050-A ** ON A/C NOT FOR ALL | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | N28 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | IGGS/CTRL | 7YA | P28 |
| ** ON A/C NOT FOR ALL | |||
| 122VU | CSAS / CTRL | 1HW | U17 |
C. Leak Test
(2) Examine the joints on the in-tank housing (3) and the duct assembly (6) for air leakage.
5. Close-upNOTE: You must do the two subsequent steps at the same time. Two persons are necessary to do these steps.
(1) Do the BITE test of the Inert Gas Generation System (IGGS) with bleed air (Ref. AMM TASK 47-31-34-740-001). (2) Examine the joints on the in-tank housing (3) and the duct assembly (6) for air leakage.
NOTE: Air leaks are not permitted.
(3) Do the double barrier check of the dual-flapper check valve (Ref. AMM TASK 47-20-43-400-001). Subtask 47-20-41-410-050-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) Close the access panels (Ref. AMM TASK 28-10-00-910-002).
(3) Remove the access platform.
Subtask 47-20-41-650-052-A ** ON A/C NOT FOR ALL Subtask 47-20-41-860-053-A ** ON A/C NOT FOR ALL (1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the access panels (Ref. AMM TASK 28-10-00-910-002).
(3) Remove the access platform.
C. Put the aircraft back to its initial configuration.
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(2) Remove the ground support and maintenance equipment, the special and standard tools and all other items.