Originally Posted by
JamesNoBrakes
Even that is perfectly legal if the SIC is required by regulation/operating rule. There's a legal interpretation that IFR with Px with an autopilot is legal to log if the autopilot is not used for the flight, even when the operator has the autopilot in lieu of SIC Ops Spec. I can dig it up if anyone wants to see. There's also the 135.267 rule that requires an SIC for 10hr flight days. One would be advised to write down the circumstances, not just the time, in their logbook, but there are definitely multiple situations where SIC in 135 can be logged, without PDP. PDP just extends it to nearly all situations.
Correct. In the sentence directly following what you quoted I mentioned needing either a two pilot plane or an OP Spec, but I guess I left that kinda vague. I didn't feel like expanding on the whole autopilot in lieu of an SIC thing. Thanks for providing the additional details for OP.
Originally Posted by
TheCrimsonKing
I believe it was added because pilots were logging SIC time in single pilot airplanes which wasn't legal. You had to log it in a legal way, such as flying in an airplane certified for two pilots or through an OP Spec.