What is required for a 135 IFR flight that includes passengers?

A co-pilot certified under 135 regulations is essential for operations involving passengers in a Part 135 IFR flight to ensure adherence to safety and regulatory standards. This requirement stems from the fact that commercial operations generally involve a higher level of responsibility and complexity compared to non-commercial flights. A co-pilot not only assists with operational tasks but also enhances safety through shared responsibilities, particularly during critical phases of flight or emergencies.

While minimum flight hours are necessary for pilots, the regulation mandates specific ratings and certifications rather than just hours alone. Single pilot compliance may apply in certain situations, but it does not address the critical aspect of safety when transporting passengers. Flight plan approval is important, but it is a procedural requirement rather than a specific regulatory staffing requirement pertaining to the certification of crew members. Having a co-pilot ensures that the crew is adequately prepared to handle the operational demands of passenger flights under IFR conditions.