HASELL is used before any aerobatic maneuver including stalls and recovery from dangerous and unusual attitudes training
Height - Sufficient to recover
Airframe – Clean e.g. Flaps, gear etc
Security - Hatches & harnesses securer, loose items stowed
Engine - T’s & P's OK
Location - Clear of ABC's (A = Active airfields, B = Built up areas, C = Clouds and controlled airspace)
Lookout - execute clearing turns left and right.
Additional maneuvers carried out close in time to the first can be performed with the abbreviated HELL Check.