Definition
An FAA mechanic certificate rating that authorizes the holder to perform, supervise, and approve maintenance, preventive maintenance, and alterations on aircraft engines, propellers, and their accessories, and to approve and return those items to service after such work, within the limits of the certificate and applicable regulations.
Plain English
It is the part of a mechanic's certificate that says the mechanic is qualified to work on aircraft engines and propellers, and to sign them off as safe to fly again.
Context Anchor
Seen in mechanic certification, maintenance records, repair station hiring requirements, and FAA rules about who may perform or sign off engine work.
Derivation
Powerplant comes from the idea of a self-contained source of mechanical power. In aviation, it refers to the engine and the systems directly tied to producing thrust. A rating is an official authorization added to a certificate, stating what the holder is qualified to do.
Why Pilots Care
It confirms the mechanic who services your engine is FAA-qualified for that work, directly affecting airworthiness and safety.
Intuition Check
“Rating” does not mean a review score or a measure of engine power here. It means an official FAA authorization on a mechanic certificate. “Powerplant” does not mean an electrical plant or factory here. It means the aircraft engine and related systems.
Example Sentence 1
The mechanic who replaced the cylinder held both Airframe and Powerplant ratings, so he was able to sign off the work himself.
Example Sentence 2
After earning the powerplant rating, she could sign off engine overhauls in the maintenance logs.