What document is required to be on board every commercial helicopter flight?

For every commercial helicopter flight, it is essential to have the pilot's license and the aircraft's registration documents on board. The pilot's license is crucial because it verifies that the pilot is qualified and legally authorized to operate the helicopter, ensuring compliance with the regulatory standards set forth by aviation authorities.

The aircraft's registration documents are equally important, as they confirm the legal ownership of the helicopter and provide necessary details about the aircraft, such as its registration number and specifications. Having these documents helps to ensure safe, legal, and accountable operations.

While a flight plan is an important part of flight safety and operational procedure, it is not mandated to be on board every flight. The maintenance logbook is vital for tracking the aircraft's maintenance history and ensuring its airworthiness, but it is not a requirement for each flight. Insurance documents are necessary for operational legality but are not typically required to be physically on board during a flight. Thus, the combination of the pilot's license and the aircraft's registration documents meets the legal and safety obligations necessary for commercial helicopter operations.