History
Understanding The Motivation
In 2018, the FAA issued a regulatory relief to 14 CFR 135.99 to permit Part 135 air carriers to receive authorization of an SIC PDP via its OpSpecs. Under this new program, pilots employed by these authorized Part 135 operators are able to log SIC flight time in an aircraft or operation that otherwise does not require an SIC.
Through this, the FAA recognizes that certain airplanes (multi-engine or turbine single engine) may prove to be an excellent introduction to flying more complex jet aircraft, so long as the SIC is trained, qualified, and is provided the necessary environment to foster their skills.