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Bulk fuel sampling: See paragraph 7.4.3.e below.
7.4.3 Bulk fuel guidelines
The following inspection items should be used as a minimum guide for a fuel quality control system:
. A daily log will be used to record the following items:
a) The age and delivery date of storage fuel.
b) Sample and water test results from the fuel tank sumps, all filters and monitors, and all fuel nozzles.
c) Differential pressure readings.
d) Fuel Filter changes – annual as a minimum.
e) Certification of fuel. Bulk delivery fuel should always be accompanied by a Certificate of Release. Fuel should be sampled, visually inspected for appearance and contaminates, chemically tested for water and measured for density, before delivery into storage tanks. Maximum variance of the density compared to the density on the Certificate of Release should not exceed 0.003.
. The interior of all tanks, tank seals, and pressure relief valves should be inspected on an annual basis, and all gauges/pressure relief valves should be calibrated annually unless the manufac-turer specifies differently.
. Microbe growth testing
a) Initial testing to establish “normal” microbe level: adopt a random routine testing of a few tanks on a quarterly basis. This should include primary supply tank(s), and several mobile tanks (if used).
b) Long-term testing: once the “normal” microbe level is established as noted above, it is rec-ommended that fuel supplies be tested on a six-month interval.
c) Fuel quality indicators: if any contra-indications from tank drains are apparent, such as dark coloured (brown, black) water, sulphide smells, water and fuel with a frothy or lacy interface, immediately conduct a test, as these strongly indicate microbial activity within the recent time span.
. Microbe growth treatment
If the microbe growth test is positive, use of the affected tank(s) should be suspended and the following protocol followed. Once the protocol has been followed then a repeat microbe pres-ence test should be completed.
a) Bulk or transport tanks: full tank cleaning including disinfecting the tank surfaces with Chlorex bleach (or equivalent) followed by fresh water rinsing, inspect and replace all downstream contaminated filter elements.
b) Aircraft tanks and filters: filters should be replaced and tanks drained and cleaned follow-ing the manufacturer recommendations.
c) Use of microbes treatments: any microbe treatments, such as “BioBar” or equivalent should be used with caution and the aircraft manufacturer contacted to determine is use of such treatments are allowed for that model aircraft’s fuel.
7.4.4 Drummed fuel guidelines
The following precautions are applicable to operations that involve the use and storage of drummed fuel:
. Drums should be tight with no broken seals prior to use.
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飞机管理指导方针 Aircraft management guidelines(39)
