IA Special Airworthiness Certificates & Major Alterations

Question 1

What is a major alteration as defined in 14 CFR Part 1?

Accepted Answer

An alteration not listed in the aircraft, engine, or propeller specifications that might appreciably affect structural strength, flight characteristics, or other airworthiness qualities

Answer

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.

Question 2

Who may approve a major alteration for return to service?

Accepted Answer

A certificated IA, a certificated repair station, or an FAA inspector

Answer

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.

Question 3

What FAA form is used to record a major repair or major alteration performed on an aircraft?

Accepted Answer

FAA Form 337 (Major Repair and Alteration)

Answer

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.

Question 4

When does an IA forward a copy of FAA Form 337 to the FAA?

Accepted Answer

Within 90 days after the aircraft is approved for return to service, sent to the responsible FSDO

Answer

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.

Question 5

What is the purpose of a Supplemental Type Certificate (STC)?

Accepted Answer

To provide FAA approval for a specific alteration to a specific type of aircraft

Answer

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.

IA - Inspection Authorization Certification Practice Test

IA - Inspection Authorization Certification Practice Test

IA Special Airworthiness Certificates & Major Alterations