Choppy, does your car have a spare wheel?
Thought we were talking about engines
But top causes of helicopter accidents :
Mishandled Controls
(22.02%) 85
Drivetrain Failure
(4.66%) 18
Wire Strike
(4.40%) 17
Under Investigation
(3.89%) 15
Loss Of Control IMC
(3.63%) 14
Maintenance Error
(3.11%) 12
Collision with Ground Based Object
(2.85%) 11
taken from:
Helicopter Safety | Common Helicopter Accident Causes