Definition
Single-celled microscopic organisms, some of which can grow inside aircraft fuel tanks — particularly in jet fuel — where water has collected at the bottom. These microbes live at the fuel-water interface and produce sludge, slime, and acidic byproducts that can clog filters, block fuel lines, and corrode tank structure.
Plain English
Tiny living organisms, too small to see without a microscope, that can grow inside fuel tanks where water has settled. They feed on the fuel and create sludge that can block fuel lines and eat into the metal of the tank.
Context Anchor
Seen in fuel contamination discussions, fuel tank inspection, fuel sampling, and aircraft maintenance procedures.
Derivation
From the Greek 'bakterion,' meaning 'small staff' or 'little rod,' because the first bacteria observed under early microscopes were rod-shaped. The name stuck even though bacteria come in many shapes.
Why Pilots Care
Bacterial contamination can restrict fuel flow, damage fuel pumps, and lead to engine failure if not detected and treated.
Grounding Statement
Picture a small amount of water sitting at the bottom of a fuel tank; bacteria can live at that water-fuel boundary and slowly create slime-like contamination.
Intuition Check
Bacteria are not only a health or food-safety issue. In aviation, they can also be a fuel contamination problem when water is present in the fuel system.
Example Sentence 1
The mechanic found bacteria growing at the bottom of the fuel tank where water had collected, and treated the fuel with a biocide.
Example Sentence 2
Adding biocide to the tanks stopped the bacteria from returning after the last contamination event.