I do not think she is the total aircraft commander... I know in my platform the HAC is usually at least a O-3, but sometimes you get the JG that is about to pick it up that finishes the HAC PQS. Do not take this as downing P-3's or anything, but I think with a FE doing the engine management and all that a JG should very well be able to be an aircraft commander in a P-3. Especially without having to worry about ship DLQ's and the like. Just have to plant the big bird on the runway, and do all their warfare stuff, EP's. Guys I know that used to work in P-3's say it is common practice to fly with 1 engine out to conserve fuel on station, so I imagine it handles really well in the air.