Data used for approving major repairs must be FAA approved prior to its use. Which of the following is approved data for major repairs?

Data used for approving major repairs must be FAA approved prior to its use. Which of the following is approved data for major repairs?

• A. Previously approved FAA Form 337 for a like model aircraft.
• B. Supplemental type certificate data.
• C. Airworthiness Directives
• D. Advisory Circulars.

Answer: (C)

Major repairs must be based on data that the FAA has officially approved, ensuring the repair restores airworthiness in a way that is enforceable and verifiable. An Airworthiness Directive is FAA-approved data that specifically prescribes the actions needed to correct an identified unsafe condition, including repair methods or criteria. Because ADs are mandatory and issued by the FAA, the data they contain constitute approved instructions you can rely on when approving a major repair. The other options don’t fit as well. A FAA Form 337 is just a record used to document that a major repair or alteration has been performed; it isn’t the pre-approval data itself. Supplemental type certificate data are FAA-approved data used to authorize a modification that changes the aircraft’s design, which is a broader category than a repair and not the standard source for approving a routine major repair. Advisory Circulars provide non-mandatory guidance and are not the required, FAA-approved data you rely on to approve a repair.

Major repairs must be based on data that the FAA has officially approved, ensuring the repair restores airworthiness in a way that is enforceable and verifiable. An Airworthiness Directive is FAA-approved data that specifically prescribes the actions needed to correct an identified unsafe condition, including repair methods or criteria. Because ADs are mandatory and issued by the FAA, the data they contain constitute approved instructions you can rely on when approving a major repair.

The other options don’t fit as well. A FAA Form 337 is just a record used to document that a major repair or alteration has been performed; it isn’t the pre-approval data itself. Supplemental type certificate data are FAA-approved data used to authorize a modification that changes the aircraft’s design, which is a broader category than a repair and not the standard source for approving a routine major repair. Advisory Circulars provide non-mandatory guidance and are not the required, FAA-approved data you rely on to approve a repair.