Definition
An FAA-issued certificate (FAA Form 8100-2) authorizing the operation of an aircraft that has been type-certificated in the normal, utility, acrobatic, commuter, or transport category, or as a manned free balloon, and that conforms to its approved type design and is in a condition for safe operation. It remains in effect as long as the aircraft is properly maintained, inspected, and altered in accordance with the applicable regulations.
Plain English
A document the FAA gives an aircraft to say, 'this aircraft was built to an approved design and is safe to fly.' It stays valid as long as the aircraft keeps being maintained and inspected the right way.
Context Anchor
Pilots encounter this term when checking required aircraft documents, renting or buying an airplane, or confirming that an aircraft is legal to operate.
Derivation
Airworthiness' combines 'air' with 'worthy' (from Old English 'weorth', meaning 'having value or merit'). An aircraft that is 'airworthy' is literally 'worthy of the air' -- fit and safe to be flown. 'Standard' here means it meets the normal, baseline FAA requirements, as opposed to a 'special' airworthiness certificate issued for experimental, restricted, or limited-category aircraft.
Why Pilots Care
Most privately owned and rental airplanes require a current standard airworthiness certificate to be flown legally.
Intuition Check
“Standard” does not just mean normal or common here. It means a specific FAA type of airworthiness certificate, separate from a special airworthiness certificate.
Example Sentence 1
Before her first flight in the rental Cessna, she checked that the standard airworthiness certificate was displayed in the cabin and that the aircraft logbooks showed current inspections.
Example Sentence 2
After the annual inspection, the mechanic updated the records to keep the standard airworthiness certificate valid.