Definition
The set of federal airworthiness standards under which an aircraft was originally designed, tested, and approved for flight. In the United States, these are found in Title 14 of the Code of Federal Regulations (14 CFR), with the most common parts being Part 23 (normal-category airplanes), Part 25 (transport-category airplanes), Part 27 (normal-category rotorcraft), and Part 29 (transport-category rotorcraft). The regulations the aircraft was certified under determine the performance data, operating limitations, and required equipment that appear in its Pilot's Operating Handbook or Aircraft Flight Manual.
Plain English
These are the safety and design rules an aircraft had to meet before it was allowed to be sold and flown. Different rules apply to different sizes and types of aircraft, and the rules used for a given aircraft shape what its performance numbers and limits look like.
Context Anchor
Seen in aircraft performance discussions, especially when explaining where published takeoff, climb, landing, and weight-limit information comes from.
Derivation
Certify comes from the Latin certificare, meaning 'to make sure' or 'to attest as true.' An aircraft certification regulation is the official rulebook used to make sure the design is safe before it earns its certificate.
Why Pilots Care
Pilots rely on these regulations because they determine the exact performance numbers and safety margins published in the aircraft flight manual.
Intuition Check
Do not read “certification” here as a pilot certificate or training approval. In this context, it means FAA approval of the aircraft design and its required performance data.
Example Sentence 1
The performance charts in the handbook were produced under the aircraft certification regulations in effect when the airplane was approved, so they assume a new airframe and a properly trained pilot.
Example Sentence 2
Transport category aircraft follow stricter certification regulations than normal category airplanes for the same performance items.