Definition
A standardized FAA form (FAA Form 8010-4) submitted by mechanics, repair stations, owners, or operators to report failures, malfunctions, or defects discovered in aircraft, engines, propellers, or appliances. The reports are collected by the FAA to identify recurring problems across the fleet and to support corrective action such as airworthiness directives or service bulletins.
Plain English
An official form used to tell the FAA when something on an aircraft has failed, broken, or shown a defect, so that problems affecting many aircraft can be spotted and fixed.
Context Anchor
Seen in aircraft maintenance records, inspection discussions, and reporting requirements after a significant mechanical problem is found.
Derivation
Malfunction combines mal-, meaning bad or wrong, with function, meaning to work. Defect comes from a word meaning a lack or failure. Together, the phrase points to two related ideas: something did not work correctly, or something was found to be faulty.
Why Pilots Care
Helps track recurring problems, supports investigations, and can lead to fixes or airworthiness directives that improve fleet safety.
Intuition Check
Do not read this as just a casual note that something broke. In this context, it means a formal aviation report about a problem that may affect safety, legality, or continued operation of the aircraft.
Example Sentence 1
After finding a cracked engine mount during the annual inspection, the mechanic submitted a Malfunction and Defect Report to the FAA.
Example Sentence 2
The pilot submitted a Malfunction And Defect Report following an unexpected engine roughness during the flight.