Jose wrote:

61.51(e)(3) An authorized instructor may log as pilot-in-command time
all flight time while acting as an authorized instructor.

Seems to me this says that it has to be flight time first, he has to be
acting as an authorized instructor =during= that flight time, and =then=
he can log it as PIC time.

Yes, but, if the CFI is not manipulating the controls, then he is not flying the
aircraft. He has been in an aircraft that someone else is flying.

George Patterson
I prefer Heaven for climate but Hell for company.