Which of the following is NOT part of the minimum equipment required onboard a powered aircraft?

In the context of the minimum equipment required onboard a powered aircraft, the correct response highlights that a life raft is not considered essential equipment for all types of powered aircraft. Minimum equipment lists are established to ensure the basic safety and functionality of the aircraft, particularly for operations where water landings are not expected.

Charts are essential for navigation, aiding pilots in visualizing airspace, waypoints, and navigation aids. A fire extinguisher is crucial for managing potential in-flight fires, which could arise from various sources on the aircraft, ensuring passenger and crew safety. Additionally, a first aid kit is important for addressing medical emergencies that may occur during flight.

In contrast, the requirement for a life raft is generally specific to aircraft that operate over large bodies of water where a ditching scenario might be anticipated. Not all powered aircraft operate under conditions that necessitate the carrying of a life raft, making it non-essential for the minimum equipment list unless specified by the operation's route and environment.