Originally Posted by Das Auto

How about this.

There is a provision in the regulations which allows a pilot who is type rated in the aircraft and is the sole manipulator of the controls to log PIC time. The intent of this provision is to allow said pilot to escape the catch 22 predicament of not having the PIC time required to upgrade and can't build any PIC time because he's F.O.

Its advisable to log this time separately form PIC (Captain) time in the logbook as this practice is not common in the 121 world.