R  (1) Do one of the steps that follow to check the sample(s) for 
R  microbiological contamination: 
R  (Ref. Fig. 302/TASK 12-32-28-991-005) 
R  (a) Use the FUELSTAT RESINAE TEST KIT CONIDIA BIOSCIENCE UK (CAGE 
R  CODE KE385) (and the manufacturers instructions) to make an 
R  analysis of each sample. 
R  (b) Send each sample to an approved laboratory for analysis. 
R  (2) Do a check of the results: 
R  NOTE : If you only do one test it can give an incorrect indication of____ 
R  the condition of the fuel tanks. If a test shows 
R  contamination, (moderate or heavy) do the test again (in not 
R  more than 10 days) before you remove the aircraft from 
R  service. Use the same test kit/laboratory for the second test. 
R  (a) Negligible contamination: 
R  1_  The contamination is negligible if the indication lines (on
R  the test kit) show a negative result. 
R  2_  Continue to monitor the fuel tanks at the scheduled inspection
R  interval. No microbiological treatment is necessary. 
R  (b) Moderate contamination: 
R  1_  The contamination is moderate if the indication lines (on the
R  test kit) show a low positive result. 
R  2_  Use the same method and do the sample test again in not more
R  than 10 days after the first test. 
R  3_  If the contamination has not changed from moderate:
R  - do the BIOBOR biocidal shock treatment (moderate 
R  contamination procedure) to all fuel tanks (Ref. TASK 28-11-
R  00-600-008) or (Ref. TASK 28-11-00-600-008) 
R  or 
R  - do the KATHON biocidal shock treatment (moderate 
R  contamination procedure) to all fuel tanks (Ref. TASK 28-11-
R  00-600-008) or (Ref. TASK 28-11-00-600-008). 
R  (c) Heavy contamination 
R  1_  The contamination is heavy if the indication lines (on the
R  test kit) show a high positive result.

R  2_  Use the same method and do the sample test again in not more
R  than 10 days after the first test. 
R  3_  If the contamination has not changed from heavy:
R  - do the BIOBOR biocidal shock treatment (heavy contamination 
R  procedure) to all fuel tanks (Ref. TASK 28-11-00-600-009) or 
R  (Ref. TASK 28-11-00-600-009) 
R  or 
R  - do the KATHON biocidal shock treatment (heavy contamination 
R  procedure) to all fuel tanks (Ref. TASK 28-11-00-600-009) or 
R  (Ref. TASK 28-11-00-600-009). 
R  NOTE : When you do the heavy contamination procedure, you will____ 
R  need to enter all the fuel tanks to remove the 
R  contamination (Ref. TASK 28-11-00-600-003). 
R  Subtask 12-32-28-281-062 
R  D. Sample Analysis - HY-LITE Jet A1 Test Kit Procedure 
R  NOTE : The manufacturer recommends that you only use a fuel-resistant____ 
R  transparent plastic container for the test. A glass container 
R  could have an unwanted effect on the test result. 
R  (1) Do one of the steps that follow to check the sample(s) for 
R  microbiological contamination: 
R  (Ref. Fig. 302/TASK 12-32-28-991-005) 
R  (a) Use the HY-LITE JET A1 FUEL TEST KIT MERCK KGAA, GERMANY (CAGE 
R  CODE D2186) (and the manufacturers instructions) to make an 
R  analysis of each sample. 
R  (b) Send each sample to an approved laboratory for analysis. 
R  (2) Do a check of the results: 
R  NOTE : If you only do one test it can give an incorrect indication of____ 
R  the condition of the fuel tanks. If a test shows 
R  contamination, (moderate or heavy) do the test again (in not 
R  more than 10 days) before you remove the aircraft from 
R  service. Use the same test kit/laboratory for the second test. 
R  (a) Negligible contamination: 
R  1_  The contamination is negligible if the sample contents has
R  1000 RLU/litre (Relative Light Units) or less.

R  2_  Continue to monitor the fuel tanks at the scheduled inspection
R  interval. No microbiological treatment is necessary. 
　
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