ABCD -- used for emergency procedures in case of engine failure in a single-engine plane at altitude.
· A – airspeed. Trim for best glide. In a lot of trainer aircraft, this may be close to full nose-up trim.
· B – best place to land. Pick out a landing spot and head for it. If you get there and you are high, you can spiral down.
· C – checklist. If time permits, turn to the emergency section of the checklist to try to restart the engine. Otherwise use a flow method of checking critical items. Primer, boost pump, switch fuel tanks, carb heat or alternate air, mags (try one or the other).
· D – dialogue. If you are talking to a controller, let them know you have a problem. Otherwise go to 121.5 and tell anyone within