Differences Between FAA Part 91, 121, and 135 in Aviation
Pilot Institute
FEBRUARY 26, 2025
Part 135 only applies to aircraft with 30 or fewer seats or a maximum payload capacity of 7,500 pounds, including commercial helicopter operations (other than external loading (i.e., The Pilot in Command (PIC) on a part 121 operation also shares operational control with a flight dispatcher.
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