1. Not all F/O flexes are PCA's. Every flex is checked out in stages and not everyone is fully qualified to teach all events. This has very little to do with seniority. It is more a function of manning and tasking levels.

2. Any F/O flex who is PCA qualified is a fully type rated Captain on the aircraft in which they instruct. Even though they only fly the left seat with another flex/LCA in the right seat, the F/O flex in the left seat is the PIC of record on the FPR. Being PIC on a FedEx aircraft is, by definition, Captain. The only thing lacking is the seniority required to bid and hold it on the line. As we all know, seniority has nothing to do with skill, qualification, experience, proficiency, etc. We have some ultra senior captains bidding reserve, who fly very little, with massive amounts of flight time and experience who are borderline unsafe in the aircraft. In fact, flexes who spend most of their time in the schoolhouse teaching, rapidly fall behind their contemporaries in terms of flight time and experience on the line, and can also be scary to fly with for the first couple legs...so seniority doesn't mean squat when it comes to determining someone's qualifications. Seniority just means some dude got his foot in the door before you did.