On June 1, 1983, a Cessna 401A (registration N6293Q) operated by Abba Industries Inc. was involved in an aviation accident near North Las Vegas, NV. Investigators recorded the probable cause as: Failure of the adjusting screw (P/N 0841113-1) on the retraction linkage, which caused the right main landing gear to retract and shear a bolt (P/N NAS 46404-26) on the bellcrank assembly. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During landing touchdown, the aircraft's right main landing gear collapsed, causing it to veer off the runway. An FAA inspector identified a failed adjusting screw on the retraction linkage as the cause.
Incident
During the landing touchdown, the aircraft's main landing gear collapsed. After the right main gear failed, the aircraft veered to the right and came to rest approximately 600 feet beyond the threshold and 90 feet northwest of the runway edge.
Investigation
An FAA inspector examined the aircraft and reported that an adjusting screw (part number 0841113-1) on the retraction linkage failed. This failure caused the right main gear to retract, which then sheared a bolt (part number NAS 46404-26) on the bellcrank assembly. According to a Cessna representative, the failure could be the result of wear or misrigging.
Aftermath
The company that owned and operated the aircraft ceased flight operations approximately six months after the accident.
Probable cause
Failure of the adjusting screw (P/N 0841113-1) on the retraction linkage, which caused the right main landing gear to retract and shear a bolt (P/N NAS 46404-26) on the bellcrank assembly.
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