Definition
An FAA-certificated mechanic authorized to inspect, service, repair, and approve aircraft and aircraft components for return to service. AMTs typically hold an Airframe (A) rating, a Powerplant (P) rating, or both (A&P), and work under the regulatory framework of 14 CFR Part 65 and the maintenance rules in Parts 43 and 91.
Plain English
An AMT is the qualified person who fixes and maintains aircraft. They are trained and certified to do the work and to sign it off as safe to fly.
Context Anchor
Pilots encounter AMTs when an aircraft needs an inspection, a repair, a check after a reported problem, or a sign-off before it can be flown again.
Derivation
Straight description: a technician (skilled worker) who performs aviation maintenance. The older common term is 'A&P mechanic,' referring to the two ratings — Airframe and Powerplant. AMT is the broader, more current professional title.
Why Pilots Care
The pilot in command is responsible for the airworthiness of the aircraft, but only a certificated AMT can legally perform and sign off most maintenance and inspections. Knowing what an AMT can and cannot approve helps the pilot make sound go/no-go decisions when something is wrong with the airplane.
Intuition Check
Do not read AMT as just any handy person who works on machines. In aviation, an AMT is a trained aircraft maintenance professional working within aviation maintenance rules and procedures.
Example Sentence 1
After the pilot reported a rough-running engine, the AMT inspected the magnetos and cleared the aircraft for return to service.
Example Sentence 2
The pilot reviewed the recent work order with the AMT before the next flight.