Originally Posted by Turbinebound
If you are hired on to fly, lets say a CRJ-200 as a FO. Lets say you also have 1500tt etc and got your ATP. If you go pay and get a type rating in a CRJ-200, can you log PIC on the legs you fly instead of SIC??
No you can't. Because you have your ATP, you can no longer use the "sole manipulator" clause of 14 CFR part 61.51(e)(1). The purpose of 61.51(e)(1) is so "...recreational, private, or commercial pilot..." can build PIC time toward advance certificates (namely the ATP). Once you get the ATP, 61.51(e)(1) no longer applies.
Therefore to log PIC time you would have to be designated as PIC as defined in 14 CFR Part 1.1. This is the definition that airlines use in ALL operations (at least mine does, both part 121 with pax and part 91 without) and is the only PIC time they usually will consider.