Originally Posted by
JDiver
No, that's unlikely that a relief pilot would take the cockpit jump seat. On flights requiring three pilots / a relief pilot, a seat is generally blocked for the PNF if a seat is required. That seat is not available for seat selection by passengers at any time.
What's a PNF?
When the flight requires more flight crew than can sit up front, the extra pilot is assigned a specific seat based on the aircraft type. That seat has been negotiated and is part of the collective bargaining agreement with the pilots' union.