Which flight crew position is typically not necessary for aircraft operations under Part 135?

Which flight crew position is typically not necessary for aircraft operations under Part 135?

• A. Captain
• B. First officer
• C. Flight engineer
• D. Flight attendant

Answer: (C)

In the context of aircraft operations under Part 135, which governs commuter and on-demand operations in the United States, the flight engineer position is typically not a necessity. This is largely because modern commercial aircraft used in Part 135 operations are often designed with advanced avionics and systems that allow them to be operated efficiently by a two-pilot crew—a captain and a first officer.

The flight engineer’s role, which historically involved managing aircraft systems and providing support to pilots, has become largely redundant with the technological advancements in aircraft design. Consequently, aircraft operated under Part 135 are generally required only to have a captain and a first officer, both of whom have responsibilities for the flight's safe operation.

In contrast, while a flight attendant (or cabin crew) may not be required for every operation under this regulation, having them on board is often dictated by factors such as the size of the aircraft and specific operational regulations, especially for passenger flights. Similarly, the roles of captain and first officer are essential for ensuring safe flight operations. Thus, the flight engineer role stands out as the one that is not typically necessary for compliance with Part 135 regulations.