Aircraft Filter Clogging

Under favourable conditions, microbes can reproduce, forming visible slimy growth called biomass. In aircraft fuel tanks, this often manifests at the fuel-water interface or as a slimy film on tank surfaces known as a biofilm.

Turbulence can disperse biomass and biofilms into the fuel, and the consequences of this can be particularly serious in aircraft fuel tanks.

A significant increase in the differential pressure across the engine fuel filters, caused by the accumulation of microbial particulates will result in flight crews being alerted by an impending bypass indicator. Most of these incidents happen either during take-off or shortly afterwards when the fuel flow through the filters is at its peak.

Filter clogging may lead to aircraft diversions or return to the airport, bypassed filters risk contaminated fuel reaching engines which could potentially cause an engine failure. The fuel onboard an aircraft is the only component that has no back up system.  Operators prioritise avoiding filter clogging, recognising there are no laybys in the sky.

How can ECHA help?

• Our UK Laboratory conducts in-depth analysis of fuel and filter samples to assess microbiological contamination Our laboratory services provide comprehensive insights into the extent of contamination, aiding in effective remediation strategies.
• ECHA provide on-site Microbial Test Kits: We offer the MicrobMonitor®2 test kit, a globally recognised industry standard test (IP 613/ASTM D7978) for detecting microbiological contamination. These kits can be used on-site or in the laboratory by non-microbiologists, providing quick and reliable results.
• Our team can conduct site surveys of tanks and systems at your fuel farm or airport to identify potential microbiological contamination These surveys help in proactively addressing concerns and implementing preventive measures.
• We provide expert advice on remediation, control, monitoring strategies, and best practices to mitigate microbiological contamination Our consultancy services are tailored to your specific needs, ensuring effective solutions.
• We offer comprehensive and customised training courses on microbiological contamination of jet fuels. These courses equip your staff with the knowledge and skills needed to effectively manage and prevent contamination issues.