Who has the primary responsibility for the airworthiness of an aircraft under 14 CFR Part 135?

The primary responsibility for the airworthiness of an aircraft under 14 CFR Part 135 lies with the certificate holder of the aircraft, which typically refers to the operator or the entity that holds the operating certificate. This responsibility includes ensuring that the aircraft is maintained and operated according to FAA regulations and that it meets all safety standards before flight.

The certificate holder is responsible for establishing maintenance schedules, ensuring that inspections are performed, and that any necessary repairs are completed. This includes keeping records of maintenance activities and ensuring that personnel involved in the maintenance and operation of the aircraft are properly trained and qualified.

While other parties, such as the registered owner and the pilot, play significant roles in operations and compliance with regulations, it is the certificate holder who has the ultimate legal obligation to ensure that the aircraft is airworthy at all times when it is in operation under Part 135.