POPULAR GROVE, IL, USA
N39714
WACO UPF-7
THE PILOT EXPERIENCED SEVERE ENGINE VIBRATION DURING CRUISE FLIGHT. THE PILOT PERFORMED AN EMERGENCY LANDING IN A FIELD. BECAUSE OF THE LENGTH OF THE FIELD THE PILOT LANDED HARD AND THE LEFT MAIN GEAR COLLAPSED. THE SEPARATED GEAR STRUCK AND FRACTURED THE LEFT WING SPAR. INVESTIGATION REVEALED THE ENGINE VIBRATION WAS INDUCED BY THE SEPARATION OF SIX INCHES OF THE BLADE TIP OF THE ALUMINUM CONSTRUCTED CURTIS-REED PROPELLER.
Source: NTSB Aviation Accident Database
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