(1) radio emergency! (2) try to restart engine (3) get back to the airfield if possible,
Completely the wrong order in any emergency of-course.
Aviate
Navigate
Communicate
In that order. So (3), then (2), then (1)
Although my (3) would be try and get the aeroplane to something large, flat and landable, if that happens to be an airfield that's a bonus.
G