On September 27, 2003, a Stinson 108-3 (registration N6624M) operated by Steven P Becker was involved in an aviation accident near Lincoln, NE. Investigators recorded the probable cause as: Fatigue fracture of the accessory gear drive at the key way. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During cruise flight, the engine failed at 3,000 feet. The pilot performed a forced landing on a sod field, but during the landing roll the airplane struck a concrete marker and nosed over. Substantial damage resulted.
Accident Overview
The accident airplane sustained substantial damage during a forced landing onto a sod field. The pilot reported that the engine failed while cruising at 3,000 feet mean sea level. During the landing roll, the airplane struck a concrete marker and subsequently nosed over.
Post-Accident Examination
An inspection of the airplane revealed that the accessory gear drive had fractured into two pieces and become dislodged from the crankshaft. A metallurgical examination of the accessory gear drive identified a fatigue fracture at the key way as the origin of the failure.
Findings
The forced landing was necessitated by a loss of engine power. The nose-over occurred after the airplane struck a concrete marker on the sod field during the landing roll. The structural damage from the impact and overturn was substantial.
Probable cause
Fatigue fracture of the accessory gear drive at the key way.
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