AA 3903 then AA 6436 at Phoenix
Yuma → Phoenix → Tucson
Timetable, Phoenix time
21:14AA 3903 from Yuma at the gate
20:12AA 6436 to Tucson leaves the gate
22 h 58 apart on the timetable, overnight
AA 6436 leaves 22 h 58 after AA 3903 arrives on the timetable: more than half a day, so not a connection we count.