Special Airworthiness Certificates & Major Alterations Flashcards
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Read the first 6 Special Airworthiness Certificates & Major Alterations flashcards as text
What is a major alteration as defined in 14 CFR Part 1?
Answer: An alteration not listed in the aircraft, engine, or propeller specifications that might appreciably affect structural strength, flight characteristics, or other airworthiness qualities
A major alteration is defined as one not in the type design specs that might significantly affect structural strength, weight, balance, flight characteristics, or airworthiness.
Who may approve a major alteration for return to service?
Answer: A certificated IA, a certificated repair station, or an FAA inspector
Major alterations may be approved for return to service by an IA, a certificated repair station rated for the work, or an FAA airworthiness inspector.
What FAA form is used to record a major repair or major alteration performed on an aircraft?
Answer: FAA Form 337 (Major Repair and Alteration)
FAA Form 337 is the standard form used to record and document major repairs and major alterations, and a copy must be kept in the aircraft records.
When does an IA forward a copy of FAA Form 337 to the FAA?
Answer: Within 90 days after the aircraft is approved for return to service, sent to the responsible FSDO
14 CFR 43.9 requires the IA to forward one copy of Form 337 to the FAA within 90 days after the aircraft is returned to service.
What is the purpose of a Supplemental Type Certificate (STC)?
Answer: To provide FAA approval for a specific alteration to a specific type of aircraft
An STC is an FAA-issued approval that allows a specific modification to be made to a specific aircraft type, providing the basis for an approved alteration.
What must an IA verify before approving a major alteration performed using an STC?
Answer: That the STC is applicable to the specific aircraft make, model, and serial number, and that the installation was performed per the STC data
The IA must confirm that the STC applies to the exact aircraft (often by checking the STC's applicability list) and that all installation instructions in the STC data were followed.
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