Biocidal Shock Treatment for Heavy Contamination - With Fuel Mixed with Biobor Biocide

TASK 28-11-00-600-009-A
Biocidal Shock Treatment for Heavy Contamination - With Fuel Mixed with Biobor Biocide

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.

NOTE: The use of the material BIOBOR within the European Union is not permitted.

1. Reason for the Job
Do this procedure not more than 10 days after the second fuel sample continues to show heavy contamination.
If you have to use BIOBOR after KATHON, you must make sure that the fuel quantity for all tanks is at low level.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	AR	SAFETY BARRIER(S)
No specific	AR	WARNING NOTICE(S)

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.11KBB1)	Antimicrobial Agent-Fuel System Liquid Additive -

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-11-28-650-003-A	Pressure Refuel with Automatic Control
TASK 12-11-28-650-004-A	Pressure Refuel with Manual Control
TASK 12-32-28-281-001-A	Drain Water Content
TASK 12-32-28-281-003-A	Sample Fuel for Microbiological Contamination Analysis
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 28-11-00-600-003-A	Removal of Microbiological Particles
TASK 28-11-00-600-009-A-01	Biocidal Shock Treatment for Heavy Contamination - With Fuel Mixed with Kathon Biocide
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 28-25-00-650-005-A	To Drain the Remaining Fuel from the ACT
TASK 31-60-00-860-001-A	EIS Start Procedure
TASK 31-60-00-860-002-A	EIS Stop Procedure
TASK 32-00-00-481-001-A	Installation of the Safety Devices on the Landing Gears
TASK 49-32-11-610-002-A	Fuel Filter Element - Removal/Installation (APS 3200)
TASK 49-32-41-920-001-A	Replacement of the Fuel Filter (131-9(A))
TASK 73-11-06-000-801-A	Removal of the Fuel Filter Element
TASK 73-11-06-400-801-A	Installation of the Fuel Filter Element
TASK 73-11-10-920-001-A	Remove, Inspect and Replace Fuel Filter Element
TASK 73-11-10-920-001-B	Remove, Inspect and Replace Fuel Filter Element

3. Job Set-up
Subtask 28-11-00-941-105-A

WARNING: OBEY THE FUEL SAFETY PROCEDURES.

A. Safety Precautions

NOTE: This procedure is applicable to Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) only. The material is Biobor. For the equivalent procedure with the use of Kathon (Ref. AMM TASK 28-11-00-600-009).

(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.
(3) Make sure that the ground safety locks are installed on the landing gear (Ref. AMM TASK 32-00-00-481-001).
(4) Put WARNING NOTICE(S) in the cockpit to tell persons not to operate:

The aircraft engines
The flap/slat system
The fuel system.

Subtask 28-11-00-960-057-B ** ON A/C NOT FOR ALL

B. Replace the Fuel Filter Elements
(1) You must replace the fuel filters for the engine and for the APU:

Before the first flight after the biocide treatment
Then between the subsequent 50 to 75 flight hours.

NOTE: You can replace the filters before you do this procedure, during or after this procedure.

(a) Replace the No. 1 and 2 engine fuel filter elements (Ref. AMM TASK 73-11-10-920-001).
(b) Replace the APU fuel filter element:

for the 131-9(A) APU (Ref. AMM TASK 49-32-41-920-001)
for the APS 3200 APU (Ref. AMM TASK 49-32-11-610-002).

Subtask 28-11-00-960-057-E ** ON A/C NOT FOR ALL

B. Replace the Fuel Filter Elements
(1) You must replace the fuel filters for the engine and the APU:

Before the first flight after the biocide treatment, and
Between the subsequent 50 to 75 flight hours.

NOTE: You can replace the filters before you do this procedure and during or after this procedure.

(a) Replace the No. 1 and 2 engine fuel-filter elements (Ref. AMM TASK 73-11-06-000-801) and (Ref. AMM TASK 73-11-06-400-801).
(b) Replace the 131-9(A) APU fuel-filter element (Ref. AMM TASK 49-32-41-920-001).

Subtask 28-11-00-860-103-A

C. Aircraft Maintenance Configuration

WARNING: MAKE SURE THAT ALL THE CIRCUITS IN MAINTENANCE ARE ISOLATED BEFORE YOU SUPPLY ELECTRICAL POWER TO THE AIRCRAFT. UNWANTED ELECTRICAL POWER CAN BE DANGEROUS.

(1) Energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-861-002).
(2) Do the EIS start procedure (ECAM only) (Ref. AMM TASK 31-60-00-860-001).
(3) On panel 115VU, make sure that the ENG 1 and 2 switches are in the OFF position.

4. Procedure
Subtask 28-11-00-860-104-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Drain the water from all of the fuel tanks (Ref. AMM TASK 12-32-28-281-001).
(2) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(3) If defuel is not possible, do the procedure given in para 4.C.
(4) Drain the remaining fuel from all of the tanks (Ref. AMM TASK 28-25-00-650-003).
(5) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-11-00-860-104-B ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Drain the water from all of the fuel tanks, (Ref. AMM TASK 12-32-28-281-001) and (Ref. AMM TASK 12-32-28-281-005).
(2) Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001).
(3) If defuel is not possible, do the procedure given in Para 4.C.
(4) Drain the remaining fuel from all of the tanks, (Ref. AMM TASK 28-25-00-650-003) and (Ref. AMM TASK 28-25-00-650-005).
(5) Do the EIS stop procedure (Ref. AMM TASK 31-60-00-860-002).
(6) De-energize the aircraft electrical circuits (Ref. AMM TASK 24-41-00-862-002).

Subtask 28-11-00-615-057-A

B. Removal of the Microbiological Particles
(1) Do the procedure for the removal of microbiological particles (Ref. AMM TASK 28-11-00-600-003).

NOTE: Do this procedure as soon as possible. This will prevent corrosion of the fuel tank structure.

Subtask 28-11-00-670-076-A

CAUTION: DO NOT USE A LARGE QUANTITY OF BIOBOR BIOCIDE IN THE FUEL:

MORE THAN 270 PPM IS NOT PERMITTED IN THE ENGINES
MORE THAN 1000 PPM CAN CAUSE SOLIDS IF THERE IS WATER IN THE FUEL.

C. Biocidal Shock Treatment for Heavy Contamination - With Fuel Mixed with Biobor Biocide, without Deful the Aircraft

NOTE: It is not necessary to defuel the aircraft before you start the biocide treatment. AIRBUS recommends that this procedure be done with the minimum amount of fuel on board (after flight and before fuel servicing).

(1) To refuel with the correct proportion of Biobor and fuel, (270 parts per million by weight) use the formula that follows for each fuel tank.

-------------------------------------------------------------------------------

! !

! C(uf) = 270(FOB+UPLIFT) !

! ---------------- !

! UPLIFT !

! !

-------------------------------------------------------------------------------

Where:

C(uf) is the concentration of Biobor required in the fuel to be added in parts per million (ppm)
FOB is the fuel quantity (kg/lbs) already on board the aircraft (without added Biobor)

UPLIFT is the refuel quantity (kg/lbs) required to fill the aircraft (with Biobor added).

For example, if the fuel quantity on board (FOB) was 10000 (kg/lbs) and the refuel quantity to add (UPLIFT) was 10000 (kg/lbs):

-------------------------------------------------------------------------------

! !

! C(uf) = 270(10000+10000) !

! ------------------- !

! 10000 !

!-----------------------------------------------------------------------------!

! C(uf) = 5400000 !

! --------- !

! 10000 !

!-----------------------------------------------------------------------------!

! C(uf) = 540 !

-------------------------------------------------------------------------------

Thus the amount of Biobor necessary in the refuel quantity (UPLIFT) is 540 ppm by weight.

NOTE: The concentration of Biobor in the refuel quantity must not be more than 1000 ppm by weight. If the result of the calculation is more than 1000 ppm, you must:

Defuel the aircraft (Ref. AMM TASK 28-25-00-650-001)
Refuel the aircraft with the correct concentration of fuel and Biobor (270 ppm by weight) (Ref. AMM TASK 12-11-28-650-003).

(2) Record the onboard fuel quantity for each fuel tank.
(3) Calculate the necessary quantity of fuel to be added to each fuel tank.
(4) Use the procedure given in step (1) to calculate the correct concentration of BIOBOR to add during refuel.
(5) Do a manual refuel of each fuel tank to its maximum capacity (Ref. AMM TASK 12-11-28-650-004).
(6) Make sure that the fuel added is treated with Biobor at the correct concentration. The Biobor concentration in each tank after refuel must be 270 ppm (by weight) or less.

NOTE: AIRBUS recommends that you refuel the aircraft to the maximum capacity. If this is not done, (for operational reasons) microbiological contamination can stay in the upper parts of the fuel tanks.

Subtask 28-11-00-670-060-A

D. Biocidal Shock Treatment for Heavy Contamination - with Fuel Mixed with Biobor Biocide
(1) In not more than 10 days, refuel all the fuel tanks to the maximum capacity. Refuel with fuel mixed with Antimicrobial Agent-Fuel System Liquid Additive - (Material No.11KBB1) , at a concentration of 270 ppm (by weight) (Ref. AMM TASK 12-11-28-650-003).

NOTE: AIRBUS recommends that you refuel the aircraft to the maximum capacity. If this is not done (for operational reasons), microbiological contamination can stay in the upper part of the tanks.

(2) Let the fuel stay in the tanks for between 36 and 72 hours.

NOTE: If ambient temperature is more than 25 deg.C (77 deg.F), the soak time must be a minimum of 36 hours. If ambient temperature is less than 25 deg.C (77 deg.F), the soak time must be a minimum of 72 hours. Airbus recommends that you always let the fuel stay in the tanks for 72 hours.

(3) During the soak time:

Do not move the aircraft
Do not operate the fuel pumps or APU
Do not do water drain tests, a high concentration of biocide will be in the sample.

(4) After the soak time, the fuel and biocide is burned through the APU and engines during normal operations.

NOTE: Obey the engine manufacturers restrictions and guidelines for your aircraft.

5. Close-up
Subtask 28-11-00-942-111-A

A. Removal of Equipment

NOTE: For disposal of waste fuel, refer to the local regulations.

(1) Make sure that the work area is clean and clear of tools and other items.
(2) Remove the safety barriers.
(3) Remove the WARNING NOTICE(S).
(4) Remove the ground support and maintenance equipment, the special and standard tools and all other items.

Subtask 28-11-00-281-055-A

B. Contamination Check
(1) Do the sampling procedure again in 10 days (but after a minimum of 5 flights) to check for contamination (Ref. AMM TASK 12-32-28-281-003).

NOTE: AIRBUS recommends that if you get a negligible result, you do not continue to use the biocide treatment.

[Rev.9 from 2019] 2026.04.02 06:16:59 UTC