What document must be provided evidence of proficiency for carry passengers?

To carry passengers, a pilot must provide evidence of proficiency through the completion of a proficiency flight check. This requirement ensures that the pilot has effectively demonstrated their ability to safely and competently perform the necessary maneuvers and procedures to operate an aircraft with passengers onboard.

The proficiency flight check typically involves a practical assessment in which the pilot demonstrates their skills in various flight scenarios, including emergency procedures and handling different phases of flight. This is crucial for ensuring not only the safety of the passengers but also the pilot's understanding of the specific aircraft's characteristics.

While a logbook signature from an instructor could indicate some form of training, and dual instruction might suggest ongoing practice, these do not replace the need for a formal proficiency flight check when it comes to passenger carrying. Similarly, a medical certificate demonstrates the pilot's fitness to fly but does not directly relate to their operational proficiency in managing passengers. Thus, the proficiency flight check stands out as the essential requirement for carrying passengers safely.