What requirement must be fulfilled before taking a passenger on a flight in a different type of airplane?

To take a passenger on a flight in a different type of airplane, a logbook endorsement specific to that aircraft is required. This endorsement serves as a formal acknowledgment that the pilot has received ground and flight training specific to the new type of aircraft and is competent to operate it. It ensures that the pilot is aware of the aircraft's systems, performance characteristics, and handling differences.

This requirement is essential to ensure safety, as different aircraft types can have significantly different flight dynamics, operational procedures, and systems. The endorsement verifies that the pilot has met the necessary training criteria pertinent to that specific aircraft before they can carry passengers.