What must occur after compliance with the data of a Supplemental Type Certificate according to FAA regulations?

After compliance with the data of a Supplemental Type Certificate (STC) according to FAA regulations, it is mandatory to obtain approval from the Federal Aviation Administration (FAA). This requirement ensures that any modifications or changes made to an aircraft under the STC meet the necessary safety, regulatory, and quality standards set forth by the FAA.

The role of the FAA is to oversee and regulate all aviation activities, ensuring that any alterations to aircraft do not compromise safety or operational integrity. The approval process includes a thorough review of the changes made, verifying that they conform to the guidelines established in the STC documentation.

Obtaining FAA approval is a critical step in the process to maintain compliance and ensure that the aircraft remains in a condition that is airworthy. Other approvals, such as those from the aircraft owner or a qualified mechanic, may be involved in different contexts but do not substitute for the necessary regulatory endorsement from the FAA for changes made under an STC.