Definition
The specific configuration of an aircraft, engine, or propeller that the FAA has formally accepted as meeting all applicable airworthiness standards. It is documented through drawings, specifications, materials, dimensions, processes, and operating limitations recorded on the Type Certificate Data Sheet (TCDS), and represents the baseline against which every individual aircraft of that type must conform to be considered airworthy.
Plain English
The exact, FAA-approved blueprint for how an aircraft model is built and equipped. Each aircraft must match this blueprint to be legal to fly.
Context Anchor
Seen in FAA certification, aircraft records, maintenance, and discussions about whether an aircraft still matches the design the FAA approved.
Derivation
"Type" refers to a specific model or design of aircraft. "Approved" means the FAA has reviewed and accepted it. Together, the phrase points to the officially sanctioned version of a particular aircraft model — the reference standard.
Why Pilots Care
Any repair, replacement, or modification must stay within this design to keep the aircraft legally airworthy; changes outside it usually require separate FAA approval.
Analogy
Think of it like the official master plan for a specific airplane model. If the actual airplane no longer matches that master plan in an important way, someone must properly approve the change.
Intuition Check
Approved does not mean simply liked, recommended, or generally acceptable here. It means formally accepted by the FAA as meeting the required standards for that specific design.
Example Sentence 1
Before installing the new avionics, the mechanic confirmed the modification was consistent with the aircraft's approved type design.
Example Sentence 2
The owner reviewed the aircraft records to verify the installed equipment remained within the approved type design.