Originally Posted by
runway30
If the PIC is the only one undertaking those functions for multiple companies, is he not operating an air carrier without an AOC?
I would say no. I could get a phone call from a company that has/rents a plane telling me their regular pilot called in sick and asking me if I would fly their plane tomorrow. That does not make me an air carrier. Their plane, their passengers, their destination. I only handle the conrtrols.