I have a question about logging check pilot time. Much of the time that I am performing the duties of a check pilot, I'm not the PIC of the flight. These would be when I'm doing a line check for a captain, either from the right seat, or from the jump seat.

So how would the major airlines expect me to log this time? I've been told that some people log all LCA time as PIC time, but that doesn't seem 100% correct since I'm not the PIC on record, even though I'm still expected to take over the plane from the PIC if warranted. I've been logging PIC LCA time as PIC, SIC LCA time as SIC, and both of these, including line checks from the jumpseat as "Instructor time". Does that seem like I'm logging some time twice? Or should I log it all separately? Log it all as PIC and Instructor time? I currently don't include LCA time from the jump seat in my total time, only instructor time.