KC-135: Smoke in the Cockpit, over the Atlantic (there's nothing like having to turn off everything over the Ocean)
KC-135: HF Radio Failure, halfway across the Pacific (Love those Oceans)
KC-135: Engine #3 Failure - FOD (Turkey Vulture)
C-172: Total Engine Failure + Power off landing (Thrown push-rod)
C-152: Total Electrical Failure, at Night.