Transparent Fleet

The segment of the existing fleet of engines and aircraft for which a new fuel is a drop-in is called the “transparent fleet.” Changes such as new or modified hardware, adjustments, or new operating procedures/limitations are not required for the aircraft and engines...

Special Airworthiness Information Bulletin (SAIB)

A Special Airworthiness Information Bulletin is an information tool that alerts, educates, and makes recommendations from the FAA to the aviation community. SAIBs contain non-regulatory information and guidance that are not mandatory and do not meet the criteria for a...

OEM Service Bulletin

Original Equipment Manufacturer (OEM) Service Bulletins are communication vehicles used by engine and aircraft type certificate (TC) holders to advise owners/operators of approved aviation fuels. New aviation fuels added to a TC are approved under traditional...

Non-Transparent Fleet

The segment of the existing fleet of engines and aircraft for which a new fuel is not a drop-in is called the “non-transparent fleet.” FAA approval of new operating limitations and changes such as new or modified hardware, adjustments, or new operating...

Drop-In Fuel

A “drop-in” fuel does not affect the airworthiness and performance of the existing aircraft and engines and typically does not require new aviation fuel-related operating limitations. An extensive qualification test program that encompasses fuel property evaluation...