A small aircraft with a standard airworthiness certificate modified for a supplemental type certificate designed for restricted special purpose operation. As the IA inspector you would

A small aircraft with a standard airworthiness certificate modified for a supplemental type certificate designed for restricted special purpose operation. As the IA inspector you would

• A. reject the FAA form 337 because the Aircraft no longer meets the requirements of its standard airworthiness certificate.
• B. approve the Aircraft for return to service.
• C. Hold the FAA form 337 until the Aircraft has been recertified with the appropriate airworthiness certificate.
• D. Take no action.

Answer: (B)

Understanding what happens after an approved modification: when an aircraft earns an FAA-approved STC, the modification is allowed and becomes part of the airplane’s approved design. The airworthiness certificate remains valid for the aircraft as long as the installation is done exactly as the STC specifies and all required paperwork is complete. As an IA, your job is to verify that the work has been done in accordance with the STC, that any restrictions or limitations from the STC are understood and documented, and that the aircraft is safe to fly. If everything checks out, you sign off on the FAA Form 337 indicating the aircraft is ready to return to service. There’s no need to reject the form, hold it for recertification, or take no action when the installation is compliant and properly documented.

Understanding what happens after an approved modification: when an aircraft earns an FAA-approved STC, the modification is allowed and becomes part of the airplane’s approved design. The airworthiness certificate remains valid for the aircraft as long as the installation is done exactly as the STC specifies and all required paperwork is complete. As an IA, your job is to verify that the work has been done in accordance with the STC, that any restrictions or limitations from the STC are understood and documented, and that the aircraft is safe to fly. If everything checks out, you sign off on the FAA Form 337 indicating the aircraft is ready to return to service. There’s no need to reject the form, hold it for recertification, or take no action when the installation is compliant and properly documented.