R  Subtask 28-11-00-670-061 
R  B. Biocidal Shock Treatment for Moderate Contamination - using Kathon 
R  Biocide with a Metered Injection Rig 
R  CAUTION : DO NOT USE A LARGE QUANTITY OF KATHON BIOCIDE IN THE FUEL:_______ 
R  - MORE THAN 100 PPM IS NOT PERMITTED IN THE ENGINES 
R  - MORE THAN 400 PPM IS NOT RECOMMENDED BY THE MANUFACTURER. 
R  NOTE : It is not necessary to defuel the aircraft before you start the____ 
R  biocide treatment. AIRBUS recommends that this procedure be done 
R  with the minimum amount of fuel on board (after flight and before 
R  fuel servicing). 
R  (1) To refuel the aircraft with the correct proportion of Kathon and 
R  fuel, (100 parts per million by weight) use the formula that follows 
R  for each fuel tank. 
R 
R  C(uf) = 100(FOB+UPLIFT)-FOB 
R  ---------------------
R  UPLIFT 
R 
R  Where: 
R  - C(uf) is the concentration of Kathon required in the fuel to be 
R  added in parts per million (ppm) 
R  - FOB is the fuel quantity (kg/lbs) already on board the aircraft 
R  (without added Kathon) 
R  - UPLIFT is the refuel quantity (kg/lbs) required to fill the 
R  aircraft (with Kathon added). 
R 
R  For example, if the fuel quantity on board (FOB) was 10000 (kg/lbs) 
R  and the refuel quantity to add (UPLIFT) was 10000 (kg/lbs): 

R 
R  C(uf) =  100(10000+10000)-10000 
R  ------------------------
R  10000 
R 
R  C(uf) =  1990000 
R  ---------
R  10000 
R 
R  C(uf) =  199 
R 

R  Thus the amount of Kathon necessary in the refuel quantity (UPLIFT) 
R  is 199 ppm by weight. 
R

R  NOTE : The concentration of Kathon in the refuel quantity must not be____ 
R  more than 400 ppm by weight. If the result of the calculation 
R  is more than 400 ppm, you must: 
R  - defuel the aircraft (Ref. TASK 28-25-00-650-001) 
R  - refuel the aircraft with the correct concentration of fuel 
R  and Kathon (100 ppm by weight) (Ref. TASK 12-11-28-650-003). 
R  (2) Record the onboard fuel quantity for each fuel tank. 
R  (3) Calculate the necessary quantity of fuel to be added to each fuel 
R  tank. 
R  (4) Use the procedure given in step (1) to calculate the correct 
R  concentration of Kathon to add during refuel. 
R  (5) Put MICROBIOLOGICAL CONTAMIN. PROTECT. MATERIALS (Material No. 17-
R  003A) into the METERING EQUIPMENT - BIOCIDE, HAMMONDS FUEL ADDITIVES 
R  INC.(CAGE CODE 0U7J1). 
R  (6) Make sure that the METERING EQUIPMENT - BIOCIDE, HAMMONDS FUEL 
R  ADDITIVES INC.(CAGE CODE 0U7J1) is correctly electrically bonded. 
R  (7) Connect the fuel tanker to the input side of a METERING EQUIPMENT -
R  BIOCIDE, HAMMONDS FUEL ADDITIVES INC.(CAGE CODE 0U7J1). 
R  (8) Connect the output side of the METERING EQUIPMENT - BIOCIDE, HAMMONDS 
R  FUEL ADDITIVES INC.(CAGE CODE 0U7J1) to the aircraft. 
R  (9) Do a manual refuel of each fuel tank to its maximum capacity 
R  (Ref. TASK 12-11-28-650-004). Make sure that the fuel added is 
R  treated with Kathon at the correct concentration. The Kathon 
R  concentration in each tank after refuel must be 100 ppm (by weight) 
R  or less. 
R  NOTE : AIRBUS recommends that you refuel the aircraft to the maximum____ 
R  capacity. If this is not done, (for operational reasons) 
R  microbiological contamination can stay in the upper parts of 
R  the fuel tanks. 
R  (10) Disconnect the METERING EQUIPMENT - BIOCIDE, HAMMONDS FUEL ADDITIVES 
R  INC.(CAGE CODE 0U7J1) and the tanker from the aircraft.

R  Subtask 28-11-00-860-106 
R  C. Aircraft Maintenance Configuration 
R  (1) Do the EIS stop procedure (Ref. TASK 31-60-00-860-002). 
R  (2) De-energize the aircraft electrical circuits (Ref. TASK 24-41-00-862-
R  002). 
R  Subtask 28-11-00-670-062 
R  D. Fuel System Treatment 
R  (1) Let the fuel stay in the tanks for between 12 and 24 hours. 
　
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