Documents issued by the FAA approving an Aircraft Type Design alteration.

Documents issued by the FAA approving an Aircraft Type Design alteration.

• A. Manufacturers Service Bulletins
• B. Supplemental Type Certificates (STC)
• C. Charts
• D. Drawings

Answer: (B)

A Supplemental Type Certificate is the FAA-issued approval that documents a change to the aircraft’s type design. It specifies exactly what the modification is, how it is to be installed, and the standards it must meet, and it authorizes operation of the aircraft with that modification. This makes it the correct document for approving an alteration to the aircraft’s type design. Manufacturer’s Service Bulletins are manufacturer guidance about maintenance or optional upgrades and aren’t FAA approvals of the type design. Charts are navigation references, not approval documents. Drawings are engineering drawings used to describe the modification, but the actual approval that changes the type design is the STC.

A Supplemental Type Certificate is the FAA-issued approval that documents a change to the aircraft’s type design. It specifies exactly what the modification is, how it is to be installed, and the standards it must meet, and it authorizes operation of the aircraft with that modification. This makes it the correct document for approving an alteration to the aircraft’s type design.

Manufacturer’s Service Bulletins are manufacturer guidance about maintenance or optional upgrades and aren’t FAA approvals of the type design. Charts are navigation references, not approval documents. Drawings are engineering drawings used to describe the modification, but the actual approval that changes the type design is the STC.