Final answer:
When installing an engine that is not on the aircraft type certificate, several FAA approvals are required. These include obtaining a Supplemental Type Certificate (STC), a valid Engine Type Certificate (TC), an Engine Installation Manual (EIM), and potentially conducting a flight test program.
Step-by-step explanation:
When installing an engine that is not on the aircraft type certificate, there are several FAA approvals required. These approvals ensure that the installation meets all safety and performance standards. The specific approvals needed depend on the type of installation and the engine being used. Some of the common approvals include:
Supplemental Type Certificate (STC): An STC is required when making a major modification to an aircraft. It is issued by the FAA after a thorough review of the proposed modification to ensure it complies with all applicable regulations and standards.
Engine Type Certificate (TC): The engine being installed must have a valid TC issued by the FAA. This certificate indicates that the engine has met all requirements for performance, safety, and emissions.
Engine Installation Manual (EIM): An EIM provides instructions and guidelines for installing and operating the engine. It is typically provided by the engine manufacturer and must be followed during the installation process.
Flight Test Program: Depending on the extent of the engine installation and its impact on the aircraft's performance, a flight test program may be required to ensure the aircraft is still safe and airworthy after the installation.
These are just a few examples of the FAA approvals that may be required when installing an engine that is not on the aircraft type certificate. It is important to work closely with the FAA and follow all regulations and guidelines to ensure a safe and compliant installation.