Originally Posted by
JamesNoBrakes
If it's 135 and 2 pilots are used to allow 10 hours of flight time, then an SIC is required by regulation.
I think in most situations your causation is backwards. Most 135 companies don’t employ and train FOs so they can get an extra 2 hrs a day. But, if they use 2 pilots because they are required to by regulation, then they can use them for the 2 extra hrs a day.