Differences Between FAA Part 91, 121, and 135 in Aviation
Pilot Institute
FEBRUARY 26, 2025
Think of private jets, charter flights, small turbo-propeller aircraft, and commercial helicopters these are usually part 135 operation aircraft. Think of regional and major airlines such as Delta, Southwest, American, SkyWest, and large cargo aircraft operated by FedEx or UPS. a helicopter sling), which is covered by part 133).
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