AM Aircraft type "7S8"
I have this as a designator on an upcoming flight. It is a 737-800, and the reverse flight still shows 738. I'm just wondering if there's something different with this designator.
Note difference between 2 flights on the same route, same day, same aircraft.
MEX SFO xx/0909 1207 AM 668 J7 C7 D7 I7 Y7 B7 M7 U7 K7|7S8*C
MEX SFO xx/1830 2128 AM 664 J7 C7 D7 I7 Y7 B7 M7 U7 K7|738*C