Question

TC approvals authorizing changes to a type design may be:

a) Supplemental Type Certificate
b) Limited Supplemental Type Certificate issued before Dec 1, 2009
c) Repair Design Approval
d) All of the above

Answer 1

TC approvals for changing a type design may include a Supplemental Type Certificate, a Limited Supplemental Type Certificate issued before Dec 1, 2009, and a Repair Design Approval, all of which confirm modifications or repairs adhere to safety regulations and maintain airworthiness.

Step-by-step explanation:

TC approvals authorizing changes to a type design can be multiple things, including a Supplemental Type Certificate (STC), a Limited Supplemental Type Certificate issued before December 1, 2009, and a Repair Design Approval. These are various forms of approvals that the Federal Aviation Administration (FAA) grants to affirm that a modification or repair on an existing type-certificated product complies with safety regulations and is airworthy. The STC is a document issued when an applicant has received FAA approval to modify an aeronautical product from its original design. The Limited Supplemental Type Certificate was a form of STC that applied to simpler modifications and was applicable until 2009. Finally, a Repair Design Approval is a specific approval granted for the design of major repairs that may affect the airworthiness of the product.