DOC AIRBUS | AMM A320FLeak Test with Fuel of the Vent Surge Tank
TASK 28-11-00-790-004-A
Leak Test with Fuel of the Vent Surge Tank
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 28-11-00-941-081-A ** ON A/C NOT FOR ALL
Subtask 28-11-00-790-056-A
Subtask 28-11-00-410-070-A
[Rev.10 from 2021]
2026.04.02 06:17:00 UTC
Leak Test with Fuel of the Vent Surge Tank
WARNING:
PUT THE SAFETY DEVICES AND THE WARNING NOTICES IN POSITION BEFORE YOU START A TASK ON OR NEAR:
1. Reason for the Job- THE FLIGHT CONTROLS
- THE FLIGHT CONTROL SURFACES
- THE LANDING GEAR AND THE RELATED DOORS
- COMPONENTS THAT MOVE.
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | AR | ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE |
| No specific | AR | BRUSH - BRISTLED, SOFT |
| No specific | AR | CONTAINER 100 L(25 USGAL) |
| No specific | AR | GROUND AIR-SUPPLY UNIT(LOW PRESSURE) |
| No specific | AR | SAFETY BARRIER(S) |
| No specific | AR | SAFETY CLIP - CIRCUIT BREAKER |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.14CDB1) | Testing Medium-Fuel Leak Detection White Powder - |
| (Material No.14SBA1) | Textile-Lint free Cotton - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 522PB, 522RB, 522TB, 560AB, 575JB, 575KB, 575LB, 575MB, 622PB, 622RB, 622TB, 660AB, 675JB, 675KB, 675LB, 675MB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-003-A | Pressure Refuel with Automatic Control |
| TASK 28-10-00-910-001-A | Safety Procedures When You Do Work in a Fuel Tank |
| TASK 28-10-00-910-002-A | Access to the Fuel Tanks and the Work Areas |
| TASK 28-11-00-790-002-A | Leak Test with Fuel of the Wing-Tank Outer and Inner Cells |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-25-00-869-001-A | Fuel Transfer |
| TASK 57-27-11-000-002-A | Removal of the Access Panel |
| TASK 57-27-11-400-002-A | Installation of the Access Panel |
Subtask 28-11-00-941-081-A ** ON A/C NOT FOR ALL
A. Safety Precautions
(2) If you want to test the RIB22 you must do the Leak Test with Fuel of the Wing-Tank Outer and Inner Cells (Ref. AMM TASK 28-11-00-790-002).
(3) Put the SAFETY BARRIER(S) in position.
Subtask 28-11-00-865-077-A 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 a fuel tank (Ref. AMM TASK 28-10-00-910-001). (2) If you want to test the RIB22 you must do the Leak Test with Fuel of the Wing-Tank Outer and Inner Cells (Ref. AMM TASK 28-11-00-790-002).
(3) Put the SAFETY BARRIER(S) in position.
B. Open, safety and tag this(these) circuit breaker(s):
Subtask 28-11-00-860-062-B | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/CTR TK/PUMP2 SPLY | 30QA | P26 |
| 121VU | FUEL/CTR TK/PUMP1 SPLY | 29QA | P23 |
| ** ON A/C ALL | |||
| 121VU | FUEL/L WING TK/PUMP2 SPLY | 7QA | N26 |
| 121VU | FUEL/L WING TK/PUMP1 SPLY | 1QA | N23 |
| 121VU | FUEL/R WING TK/PUMP2 SPLY | 8QA | Q26 |
| 121VU | FUEL/R WING TK/PUMP1 SPLY | 2QA | Q23 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/CTR TK/L&R XFR/CTL & IND | 2QL | R26 |
| 121VU | FUEL/CTR TK/L&R XFR/CTL & IND | 1QL | R25 |
| ** ON A/C ALL | |||
| 123VU | L WING TK/PUMP 1/STBY SPLY | 11QA | AD12 |
| 123VU | R WING TK/PUMP 1/STBY SPLY | 12QA | AE12 |
C. Aircraft Maintenance Configuration
(1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the LH(RH) wing vent/surge tank.
(2) Put the CONTAINER 100 L(25 USGAL) below the LH(RH) vent surge tank NACA vent.
(3) The applicable vent surge tank must be full of fuel for a minimum 30 minutes before the test.
(4) Refuel the applicable wing tank fully and keep the fuel tanker connected to the aircraft (Ref. AMM TASK 12-11-28-650-003).
(5) For the left wing surge tank only, refuel the center tank fully. Keep the fuel tanker connected to the aircraft (Ref. AMM TASK 12-11-28-650-003).
(6) On panel 800VU, put the MODE SELECT switch to REFUEL.
(7) On panel 800VU, put the applicable REFUEL VALVES switches to OPEN.
(8) On panel 800VU, put and hold the TEST switch at HI.LVL, see that the applicable HI.LVL. light (blue) goes out.
(9) Set the fuel tanker to its lowest flow-rate and pressure. When fuel flows from the NACA vent intake, release the TEST switch. Put the applicable wing tank REFUEL VALVES switch on panel 800VU to SHUT.
(10) Stop the operation of the fuel tanker and disconnect it.
(11) On panel 800VU, put the MODE SELECT switch to OFF.
(12) Clean all fuel from the external surface of the vent surge tank.
Subtask 28-11-00-010-073-A (1) Put the ACCESS PLATFORM 4M (13 FT)-ADJUSTABLE in position below the LH(RH) wing vent/surge tank.
(2) Put the CONTAINER 100 L(25 USGAL) below the LH(RH) vent surge tank NACA vent.
(3) The applicable vent surge tank must be full of fuel for a minimum 30 minutes before the test.
(4) Refuel the applicable wing tank fully and keep the fuel tanker connected to the aircraft (Ref. AMM TASK 12-11-28-650-003).
(5) For the left wing surge tank only, refuel the center tank fully. Keep the fuel tanker connected to the aircraft (Ref. AMM TASK 12-11-28-650-003).
(6) On panel 800VU, put the MODE SELECT switch to REFUEL.
(7) On panel 800VU, put the applicable REFUEL VALVES switches to OPEN.
(8) On panel 800VU, put and hold the TEST switch at HI.LVL, see that the applicable HI.LVL. light (blue) goes out.
(9) Set the fuel tanker to its lowest flow-rate and pressure. When fuel flows from the NACA vent intake, release the TEST switch. Put the applicable wing tank REFUEL VALVES switch on panel 800VU to SHUT.
(10) Stop the operation of the fuel tanker and disconnect it.
(11) On panel 800VU, put the MODE SELECT switch to OFF.
(12) Clean all fuel from the external surface of the vent surge tank.
D. Get Access
(1) Remove the applicable access panels (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002):
(2) Remove the applicable leading-edge access-panels:
(3) Remove the applicable trailing-edge access-panels:
4. Procedure(1) Remove the applicable access panels (Ref. AMM TASK 57-27-11-000-002) and (Ref. AMM TASK 28-10-00-910-002):
(2) Remove the applicable leading-edge access-panels:
(3) Remove the applicable trailing-edge access-panels:
Subtask 28-11-00-790-056-A
A. Leak Test on the Wing Vent/Surge Tanks - With Fuel
(1) Visual Inspection
(a) Look for signs of fuel leakage in these areas:
(b) Dry the area fully with a GROUND AIR-SUPPLY UNIT(LOW PRESSURE).
(c) Apply Testing Medium-Fuel Leak Detection White Powder - (Material No.14CDB1) to the area with a BRUSH - BRISTLED, SOFT.
(d) Monitor the area for a change in color of the talcum powder. This will show the location of a fuel leak and the rate of the leakage.
5. Close-up(1) Visual Inspection
(a) Look for signs of fuel leakage in these areas:
- tank seals and sealant
- structure, brackets and clamps
- fuel pipelines, couplings, bonded items, brackets and clamps.
WARNING:
WHEN YOU USE COMPRESSED AIR:
- USE THE CORRECT PROTECTION (FACE SHIELD OR GOGGLES)
- DO NOT POINT THE AIRFLOW AT YOURSELF OR OTHER PERSONS.
CAUTION:
USE THE TALCUM POWDER PROCEDURE ONLY ON THE EXTERNAL SURFACES OF THE FUEL TANKS.
(a) Dry the area of the possible leak with a Textile-Lint free Cotton - (Material No.14SBA1) . (b) Dry the area fully with a GROUND AIR-SUPPLY UNIT(LOW PRESSURE).
(c) Apply Testing Medium-Fuel Leak Detection White Powder - (Material No.14CDB1) to the area with a BRUSH - BRISTLED, SOFT.
(d) Monitor the area for a change in color of the talcum powder. This will show the location of a fuel leak and the rate of the leakage.
Subtask 28-11-00-410-070-A
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 (Ref. AMM TASK 57-27-11-400-002):
(3) Install the applicable leading-edge access-panels:
(4) Install the applicable trailing-edge access-panels:
Subtask 28-11-00-865-078-A (1) Make sure that the work area is clean and clear of tools and other items.
(2) Install the applicable access panels (Ref. AMM TASK 57-27-11-400-002):
(3) Install the applicable leading-edge access-panels:
(4) Install the applicable trailing-edge access-panels:
B. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
Subtask 28-11-00-860-063-A | PANEL | DESIGNATION | FIN | LOCATION |
|---|---|---|---|
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/CTR TK/PUMP2 SPLY | 30QA | P26 |
| 121VU | FUEL/CTR TK/PUMP1 SPLY | 29QA | P23 |
| ** ON A/C ALL | |||
| 121VU | FUEL/L WING TK/PUMP2 SPLY | 7QA | N26 |
| 121VU | FUEL/L WING TK/PUMP1 SPLY | 1QA | N23 |
| 121VU | FUEL/R WING TK/PUMP2 SPLY | 8QA | Q26 |
| 121VU | FUEL/R WING TK/PUMP1 SPLY | 2QA | Q23 |
| ** ON A/C NOT FOR ALL | |||
| 121VU | FUEL/CTR TK/L&R XFR/CTL & IND | 2QL | R26 |
| 121VU | FUEL/CTR TK/L&R XFR/CTL & IND | 1QL | R25 |
| ** ON A/C ALL | |||
| 123VU | L WING TK/PUMP 1/STBY SPLY | 11QA | AD12 |
| 123VU | R WING TK/PUMP 1/STBY SPLY | 12QA | AE12 |
C. Aircraft Configuration
(1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 28-25-00-650-001) (Ref. AMM TASK 12-11-28-650-003) (Ref. AMM TASK 28-25-00-869-001).
Subtask 28-11-00-942-072-A (1) Refuel, defuel or transfer fuel as necessary (Ref. AMM TASK 28-25-00-650-001) (Ref. AMM TASK 12-11-28-650-003) (Ref. AMM TASK 28-25-00-869-001).
D. Removal of Equipment
(1) Remove the safety barriers.
(2) Remove the containers.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.
(1) Remove the safety barriers.
(2) Remove the containers.
(3) Remove the access platform(s).
(4) Remove the WARNING NOTICE(S).
(5) Remove the ground support and maintenance equipment, the special and standard tools and all other items.