In separate incidents at Griffiss Airpark, Rome, New York, and Butler, Missouri, aircraft were damaged during forced landings after the mixture control was pulled in error. At Griffiss, an Ercoupe pilot practising touch and goes selected the mixture control at 300 feet, rather than the carb heat as intended.

In separate incidents at Griffiss Airpark, Rome, New York, and Butler, Missouri, aircraft were damaged during forced landings after the mixture control was pulled in error. At Griffiss, an Ercoupe pilot practising touch and goes selected the mixture control at 300 feet, rather than the carb heat as intended.

The pilot realised the error, but had insufficient height to restart the engine. Although the aircraft hit the runway at approximately fifty knots and ten degrees nose down, neither occupant was injured. At Butler, the CFI in a C152 gave a more realistic impression of engine failure than he intended, when he confused the mixture control with the throttle.

Neither he nor his student were injured when the Cessna overturned after striking a hole in the ground during the subsequent forced landing.