DOC AIRBUS | AMM A320FPreservation of the unused Additional Center Tank (ACT)(s) installed in the Aircraft
TASK 28-28-00-610-001-A
Preservation of the unused Additional Center Tank (ACT)(s) installed in the Aircraft
To operate the aircraft with not used and empty ACT(s).
This task will not dry the rubber bladder of the ACT. You must do this task again after 60 days to prevent a microbiological contamination in the ACT.
A. Fixtures, Tools, Test and Support Equipment
B. Consumable Materials
C. Work Zones and Access Panels
D. Referenced Information
3. Job Set-up
Subtask 28-28-00-860-129-A ** ON A/C NOT FOR ALL
Subtask 28-28-00-620-051-A ** ON A/C NOT FOR ALL
Subtask 28-28-00-860-130-A ** ON A/C NOT FOR ALL
[Rev.10 from 2021]
2026.04.01 00:07:39 UTC
Preservation of the unused Additional Center Tank (ACT)(s) installed in the Aircraft
WARNING:
OBEY THE FUEL SAFETY PROCEDURES.
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:
DO NOT GET YOUR CLOTHES SOAKED WITH FUEL.
WARNING:
MAKE SURE THAT YOU HAVE THE CORRECT FIRE FIGHTING EQUIPMENT AVAILABLE.
WARNING:
BE CAREFUL WHEN YOU USE CONSUMABLE MATERIALS. OBEY THE MATERIAL MANUFACTURER'S INSTRUCTIONS AND YOUR LOCAL REGULATIONS.
1. Reason for the JobTo operate the aircraft with not used and empty ACT(s).
This task will not dry the rubber bladder of the ACT. You must do this task again after 60 days to prevent a microbiological contamination in the ACT.
NOTE: When available, Airbus recommends you to use biocide preventatitve treatment to fill the ACT(s).
2. Job Set-up InformationA. Fixtures, Tools, Test and Support Equipment
| REFERENCE | QTY | DESIGNATION |
|---|---|---|
| No specific | 1 | METERING EQUIPMENT - BIOCIDE,FLIGHTLINE FUEL ADD.INC. |
| REFERENCE | DESIGNATION |
|---|---|
| (Material No.11KBB1) | Antimicrobial Agent-Fuel System Liquid Additive - |
| ZONE/ACCESS | ZONE DESCRIPTION |
|---|---|
| 130 | FWD CARGO COMPT AFT BULKHEAD OF AVNCS COMPT TO FWD PRESSURE BULKHEAD OF WING CENTER BOX |
| 150 | AFT CARGO COMPARTMENT FWD PRESS BULKHEAD TO AFT BULKHEAD OF AFT CARGO COMPARTMENT |
| 192MB, 522KB, 622KB |
| REFERENCE | DESIGNATION |
|---|---|
| TASK 12-11-28-650-004-A | Pressure Refuel with Manual Control |
| TASK 12-32-28-281-001-A | Drain Water Content |
| TASK 12-32-28-281-005-A | Operate Water Drain Valves in Installed ACT(S) to Drain Accumulated Water |
| 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 28-11-00-600-020-A | Preventative Treatment Procedure for Microbiological Contamination - Biobor Method |
| TASK 28-11-00-600-023-A | Preventative Treatment Procedure for Microbiological Contamination - Kathon Method |
| TASK 28-25-00-650-001-A | Pressure Defuel |
| TASK 28-25-00-869-001-A | Fuel Transfer |
| TASK 31-60-00-860-001-A | EIS Start Procedure |
| TASK 31-60-00-860-002-A | EIS Stop Procedure |
Subtask 28-28-00-860-129-A ** ON A/C NOT FOR ALL
A. Aircraft Maintenance Configuration
(1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) Open the applicable REFUEL panel 192MB, 522KB and 622KB.
Subtask 28-28-00-650-052-A ** ON A/C NOT FOR ALL (1) Obey the fuel safety procedures (Ref. AMM TASK 28-00-00-910-001).
(2) Energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-861-002).
(3) Do the EIS start procedure (upper ECAM DU and lower ECAM DU only)
(Ref. AMM TASK 31-60-00-860-001).
(4) Open the applicable REFUEL panel 192MB, 522KB and 622KB.
B. Defuel Procedure
(1) Drain the accumulated water from the ACT in accordance with the standard daily task cycle all the fuel tanks (Ref. AMM TASK 12-32-28-281-005) and (Ref. AMM TASK 12-32-28-281-001).
(3) If necessary, transfer all the fuel from the ACT to the center tank (Ref. AMM TASK 28-25-00-869-001).
4. Procedure(1) Drain the accumulated water from the ACT in accordance with the standard daily task cycle all the fuel tanks (Ref. AMM TASK 12-32-28-281-005) and (Ref. AMM TASK 12-32-28-281-001).
NOTE: When possible, Airbus recommends to perform a water drainage of ACT(s) not used in operation at an interval of 7 days.
(2) If necessary, defuel the center tank sufficiently to accept the additional fuel from the ACT (Ref. AMM TASK 28-25-00-650-001). (3) If necessary, transfer all the fuel from the ACT to the center tank (Ref. AMM TASK 28-25-00-869-001).
Subtask 28-28-00-620-051-A ** ON A/C NOT FOR ALL
A. Preparation for the Biocide Treatment of the ACT Bladder Tank
(3) If the engines are fed with biocide concentrations more than the limits permitted by the engine manufacturer, there is a high risk of unstable operation of the engines.
(4) No other method of dosing of biocide is permitted by Airbus. If a Metered Injection Rig (EI1566) is not available, you must use the non-biocide process.
(5) Do a check for biocide that was used in last 30 refuellings.
(6) To avoid the interaction of different biocides:
(a) You must use the same biocide that is used in last 30 refuellings (prevents the formation of precipitates).
(b) Airbus recommends to use a separate injection unit for Biobor and Kathon (prevents the risk of crystal formation).
Subtask 28-28-00-650-053-A ** ON A/C NOT FOR ALL WARNING:
OBEY THE FUEL SAFETY PROCEDURES.
(1) Make sure that sufficient quantity of the biocide Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) is available for this task. NOTE: The ACT(s) to be filled with the fuel (pre-mixed with the biocide) until the ACT(s) are at minimum of 10% in the refuel procedure.
(2) If you use biocide, it is mandatory to use the calibrated METERING EQUIPMENT - BIOCIDE,FLIGHTLINE FUEL ADD.INC. (compliant to EI1566) to mix the biocide into fuel tanks. This is to make sure that the biocide is mixed correctly with the fuel.(3) If the engines are fed with biocide concentrations more than the limits permitted by the engine manufacturer, there is a high risk of unstable operation of the engines.
(4) No other method of dosing of biocide is permitted by Airbus. If a Metered Injection Rig (EI1566) is not available, you must use the non-biocide process.
(5) Do a check for biocide that was used in last 30 refuellings.
(6) To avoid the interaction of different biocides:
(a) You must use the same biocide that is used in last 30 refuellings (prevents the formation of precipitates).
(b) Airbus recommends to use a separate injection unit for Biobor and Kathon (prevents the risk of crystal formation).
B. Biocide Treatment of the ACT(s)
(b) To mix the fuel with the applicable concentration of kathon biocide (Ref. AMM TASK 28-11-00-600-023).
(2) Refuel the ACT(s) with the mixed fuel until the ACT(s) are full (Ref. AMM TASK 12-11-28-650-004).
(4) The ACT(s) must have a minimum of 50 l (13 USgal) of fuel to make sure that the bladder tank of the ACT is not dry.
Subtask 28-28-00-650-053-CJ ** ON A/C NOT FOR ALL NOTE: Two different concentration of biocide are available for two different materials (biobor and kathon).
(1) Mix the fuel with the applicable concentration of biocide Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) : - For the material biobor, with a oncentration of 100ml of biobor per 1000 liters of fuel
or - For the material kathon, with a concentration of 50ml of kathon per 1000 liters of fuel:
(b) To mix the fuel with the applicable concentration of kathon biocide (Ref. AMM TASK 28-11-00-600-023).
(2) Refuel the ACT(s) with the mixed fuel until the ACT(s) are full (Ref. AMM TASK 12-11-28-650-004).
NOTE: There is no specified time to soak the mixed fuel in the ACT(s).
(3) Transfer the mixed fuel from the ACT(s) to the center tank until the ACT(s) is (are) empty (Ref. AMM TASK 28-25-00-869-001). (4) The ACT(s) must have a minimum of 50 l (13 USgal) of fuel to make sure that the bladder tank of the ACT is not dry.
B. Biocide Treatment of the ACT(s)
(1) Mix the fuel with biocide Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) , with a concentration of 100 ml of biobor per 1000 liters of fuel for the biobor material:
(a) To mix the fuel with the applicable concentration of biocide (Ref. AMM TASK 28-11-00-600-020).
(2) Refuel the ACT(s) with the mixed fuel until the ACT(s) are full (Ref. AMM TASK 12-11-28-650-004).
(4) The ACT(s) must have a minimum of 50 l (13 USgal) of fuel to make sure that the bladder tank of the ACT is not dry.
Subtask 28-28-00-550-051-A ** ON A/C NOT FOR ALL (1) Mix the fuel with biocide Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) , with a concentration of 100 ml of biobor per 1000 liters of fuel for the biobor material:
(a) To mix the fuel with the applicable concentration of biocide (Ref. AMM TASK 28-11-00-600-020).
(2) Refuel the ACT(s) with the mixed fuel until the ACT(s) are full (Ref. AMM TASK 12-11-28-650-004).
NOTE: There is no specified time to soak the mixed fuel in the ACT(s).
(3) Transfer the mixed fuel from the ACT(s) to the center tank until the ACT(s) are empty (Ref. AMM TASK 28-25-00-869-001). (4) The ACT(s) must have a minimum of 50 l (13 USgal) of fuel to make sure that the bladder tank of the ACT is not dry.
C. Operation of the Aircraft with an empty ACT for a longer time period than 60 days
(1) Do the subsequent procedure if the ACT was not refueled in a time period of less than 60 days:
(a) Do the work steps for the preparation of biocide treatment of the ACT bladder tank again.
(b) Refuel the ACT, pre-mixed with biocide, until the ACT is full (Ref. AMM TASK 12-11-28-650-004).
(c) Transfer the biocide/fuel mixture from the ACT to the center tank (Ref. AMM TASK 28-25-00-869-001).
(d) Make sure that a minimum of 5 to 10% of unused fuel stays in the ACT.
5. Close-up(1) Do the subsequent procedure if the ACT was not refueled in a time period of less than 60 days:
(a) Do the work steps for the preparation of biocide treatment of the ACT bladder tank again.
(b) Refuel the ACT, pre-mixed with biocide, until the ACT is full (Ref. AMM TASK 12-11-28-650-004).
(c) Transfer the biocide/fuel mixture from the ACT to the center tank (Ref. AMM TASK 28-25-00-869-001).
(d) Make sure that a minimum of 5 to 10% of unused fuel stays in the ACT.
Subtask 28-28-00-860-130-A ** ON A/C NOT FOR ALL
A. Put the aircraft back to its initial configuration.
(1) Make an entry in the aircraft log book that the ACT is empty and that this procedure must be done in a 60 day cycle, at latest.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(5) Close the applicable REFUEL panel 192MB, 522KB and 622KB.
(6) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).
(1) Make an entry in the aircraft log book that the ACT is empty and that this procedure must be done in a 60 day cycle, at latest.
(2) Make sure that the work area is clean and clear of tools and other items.
(3) Do the EIS stop procedure
(Ref. AMM TASK 31-60-00-860-002).
(4) On the ECAM control panel, set the UPPER DISPLAY and LOWER DISPLAY potentiometers to OFF.
(5) Close the applicable REFUEL panel 192MB, 522KB and 622KB.
(6) De-energize the aircraft electrical circuits
(Ref. AMM TASK 24-41-00-862-002).