Which of the following is NOT part of the 5P's Checklist?

• A. Plan
• B. Passengers
• C. Protocol
• D. Plane

Answer: (C)

The 5P's Checklist is a mnemonic device often used in aviation and other critical environments to ensure that essential elements are addressed before takeoff or an important operation. The checklist includes elements that are fundamental to maintaining safety and operational efficiency.

The correct answer, which identifies the item not part of the 5P's, is "Protocol." The 5P’s typically consist of Plan, Passengers, Plane, and another critical element, often thought to be "Pilot." Each of these components plays a role in ensuring that all considerations—such as operational planning, the condition of the aircraft, the well-being of the passengers, and the pilot's readiness—are accounted for prior to embarking on a mission or flight.

The inclusion of Plan, Passengers, and Plane directly corresponds to pre-flight or pre-operation preparations. They are integral in understanding what is required for a successful and safe operation, each focusing on different facets of the flight experience. Thus, "Protocol," while it may refer to procedures or guidelines, does not fit into the classification of the 5P’s and is therefore the correct choice as it does not belong to that specific checklist.