Definition
A fire that occurs aboard an aircraft while it is airborne, originating from sources such as the engine, electrical system, cabin or cockpit equipment, or onboard cargo. It is treated as a time-critical emergency requiring immediate identification of the source, application of the appropriate emergency procedure, and a prompt decision to land as soon as possible.
Plain English
A fire that breaks out in or on the airplane while it is flying. It must be dealt with right away, and the pilot needs to get the airplane on the ground quickly.
Context Anchor
Seen in emergency procedure training, ground training, and discussions of how a pilot should respond to smoke, flames, heat, or a burning smell during flight.
Why Pilots Care
An in-flight fire can rapidly lead to loss of control, systems failure, or structural damage if not managed according to established procedures.
Grounding Statement
If smoke, flames, unusual heat, or a burning smell appears while airborne, assume there may be an in-flight fire until the situation is controlled or confirmed otherwise.
Intuition Check
Do not assume an in-flight fire always means visible flames. In aviation, smoke, strong burning smells, or unusual heat can be the first signs of a fire emergency.
Example Sentence 1
After noticing smoke coming from behind the instrument panel, the pilot declared an in-flight fire and diverted to the nearest suitable airport.
Example Sentence 2
Simulator sessions include practice of in-flight fire procedures while maintaining aircraft control.