On September 4, 1995, a Stinson 108-1 (registration N8865K) was involved in an aviation accident near Corvallis, OR. Investigators recorded the probable cause as: SHEARING OF THE RIGHT MAIN LANDING GEAR SHOCK STRUT RETAINER CAP RETAINING PINS. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a touch-and-go landing, the right main landing gear collapsed after touchdown. Investigation found that four retaining pins holding the shock strut retainer cap had sheared, allowing the strut to separate. No fatigue was observed on the pins.
Incident Overview
The aircraft departed from runway 17 and remained in the traffic pattern for a touch-and-go landing. Upon touchdown at 70 miles per hour, while on the centerline, the right main landing gear collapsed.
Postcrash Examination
A postcrash examination revealed that the four retaining pins that secure the right main landing gear shock strut retainer cap had sheared. This failure allowed the shock strut to separate from the gear strut. No pre-existing fatigue was observed on the sheared pins.
Historical Context
The aircraft had been involved in a ground-loop incident 14.3 hours prior to this occurrence.