Definition
A personal risk-management checklist used in aeronautical decision-making in which the pilot reviews five categories — Plan (the route, weather, fuel, and timing), Plane (the aircraft's airworthiness and equipment), Pilot (the pilot's own fitness, currency, and experience), Passengers (their needs, experience, and influence on decisions), and Programming (avionics, automation, and how the pilot will manage them) — at key decision points during a flight to identify and mitigate risk.
Plain English
A quick five-part check a pilot runs through — covering the trip, the aircraft, themselves, who's onboard, and the cockpit equipment — to spot anything that might raise the risk of the flight before it becomes a problem.
Context Anchor
Seen in aeronautical decision-making training and used at key points such as preflight, before takeoff, during cruise, and before descent.
Derivation
Named for the five risk areas the pilot reviews, each beginning with the letter P. It is sometimes written as '5P' and sometimes as 'the Five Ps' — both refer to the same check.
Why Pilots Care
It gives pilots a repeatable way to catch and reduce risks before they become emergencies.
Intuition Check
Do not treat the 5P as a one-time checklist item. It is a repeated decision tool for noticing what has changed during the flight.
Example Sentence 1
Before starting the descent into a busy field with deteriorating weather, the pilot ran through the 5P check and decided to divert to the alternate.
Example Sentence 2
When weather changed en route, the pilot paused to recheck the 5P and chose to divert.