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

Any alteration costing more than $1,000 in parts and labor

Answer

Any change to avionics or instrumentation

Answer

Any repair requiring the use of FAA-designated engineering representatives

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

Any certificated A&P mechanic

Answer

Only an FAA Designated Airworthiness Representative (DAR)

Answer

Only a DER who approved the alteration data

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 8050-1 (Aircraft Registration)

Answer

FAA Form 8130-3 (Airworthiness Approval Tag)

Answer

FAA Form 8060-4 (Temporary Airman Certificate)

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

Never; the IA keeps all copies in the aircraft records

Answer

Within 48 hours of completing the work

Answer

Only when directed to do so by the aircraft owner

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

To allow a certificated aircraft to fly beyond its original gross weight limit

Answer

To extend the service life of an aircraft beyond its design lifespan

Answer

To certify that replacement parts meet the original type design specifications

Question 6

What must an IA verify before approving a major alteration performed using an STC?

Accepted 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

Answer

That the STC holder has FAA Diamond Award recognition

Answer

That the STC was approved within the last 10 years

Answer

That the STC has been reviewed and endorsed by the local FSDO