Definition
An FAA-issued certificate authorizing the holder to perform maintenance, preventive maintenance, and alterations on aircraft, engines, propellers, and appliances within the ratings held — typically Airframe (A), Powerplant (P), or both (A&P). Issued under 14 CFR Part 65.
Plain English
An official FAA approval that allows a person to legally work on aircraft. Different ratings on the certificate cover different parts of the aircraft, such as the airframe or the engine.
Context Anchor
Seen in discussions of aviation qualifications, maintenance responsibility, aircraft logbooks, and who may legally perform or sign for maintenance work.
Derivation
Mechanic comes from an old Greek word meaning a machine or device. Certificate comes from Latin roots meaning to make something certain or officially confirm it. Together, the phrase points to an official confirmation that a person is qualified to work on aircraft machinery within stated limits.
Why Pilots Care
Only work signed off by a holder of this certificate is legally valid for returning an aircraft to flight status.
Intuition Check
Do not assume a mechanic's certificate is just a school diploma or a general statement that someone is handy with tools. In aviation, it is an FAA authorization with specific legal privileges and limits.
Example Sentence 1
The annual inspection was signed off by a technician holding a mechanic's certificate with both Airframe and Powerplant ratings.
Example Sentence 2
After completing the required tests, the applicant received a mechanic's certificate that allowed work on both airframes and powerplants.