What certification must a first officer of a newly acquired FAR Part 25 certificated airplane at least hold?

For a first officer flying a newly acquired FAR Part 25 certificated airplane, the appropriate certification is a commercial pilot certificate with an instrument rating. This requirement ensures that the first officer possesses the necessary skills to operate the aircraft safely, especially in varying weather conditions where instrument flying may be required.

A commercial pilot certificate indicates that the individual has undergone rigorous training and has demonstrated the ability to execute advanced flight maneuvers, which is crucial for operating larger transport category aircraft typically classified under FAR Part 25. Furthermore, the instrument rating is essential as it ensures that the pilot can fly under Instrument Flight Rules (IFR), allowing them to rely on instruments for navigation and control, particularly during inclement weather or low visibility situations.

This combination of certifications guarantees that the first officer meets the minimum regulatory standards set forth by the Federal Aviation Administration (FAA) to contribute to the safety and operation of the aircraft, alongside the captain.