A certificated mechanic without an inspection authorization who signs the appropriate block on FAA Form 337 is doing what?

A certificated mechanic without an inspection authorization who signs the appropriate block on FAA Form 337 is doing what?

• A. Certifying that the work was done in accordance with the requirement of 14 CFR part 43
• B. Approving the work for return to service
• C. Not allowed to sign the Form 337
• D. Certifying that the work is airworthy

Answer: (A)

The main idea here is what the signature on FAA Form 337 represents. When a certificated mechanic signs the form for a major repair or alteration, they are certifying that the work was performed in accordance with the applicable rules and approved data, specifically 14 CFR part 43. This signature shows the work meets the required maintenance standards, not that the aircraft is automatically airworthy or that it’s been approved for return to service. Because the signer doesn’t have an Inspection Authorization, they aren’t the person who approves the aircraft for return to service. That approval requires an IA’s sign-off after inspecting the work. So, the mechanic’s action is about confirming proper execution of the maintenance per Part 43, rather than declaring airworthiness or giving permission to fly again.

The main idea here is what the signature on FAA Form 337 represents. When a certificated mechanic signs the form for a major repair or alteration, they are certifying that the work was performed in accordance with the applicable rules and approved data, specifically 14 CFR part 43. This signature shows the work meets the required maintenance standards, not that the aircraft is automatically airworthy or that it’s been approved for return to service.

Because the signer doesn’t have an Inspection Authorization, they aren’t the person who approves the aircraft for return to service. That approval requires an IA’s sign-off after inspecting the work. So, the mechanic’s action is about confirming proper execution of the maintenance per Part 43, rather than declaring airworthiness or giving permission to fly again.