What type of data is typically included in a Pilot Report (PIREP)?

A Pilot Report, commonly referred to as a PIREP, primarily consists of the pilot's firsthand observations about weather conditions during flight. This includes details on turbulence, cloud cover, visibility, temperature, and any significant weather phenomena encountered. Such reports are crucial for providing real-time information to air traffic control and other pilots, enhancing situational awareness and safety. While elements like flight hours and distance traveled, conditions of navigation aids, and equipment checklists are important in aviation, they are not the focus of a PIREP, which is specifically designed to share the subjective experience of weather conditions from the pilot's perspective.