NTSB Identification: SEA95LA229.
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Accident occurred Saturday, September 30, 1995 in ROBERTS, ID
Probable Cause Approval Date: 04/29/1996
Aircraft: PIPER PA-18A, registration: N1953P
Injuries: 3 Minor,1 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

The pilot reported that while landing on his private airstrip the left main wheel separated from the aircraft and the aircraft nosed over. According to a county sheriff report, the left main wheel retaining nut and cotter pin were missing from the axle, and there was no cotter pin securing the right main wheel retaining nut. The airplane had undergone a major rebuild and annual inspection about 5 months (12 flight hours) before the accident. The pilot stated that he performed a preflight inspection on the day of the accident but did not check the cotter pins, which are visible if installed. A statement in the sheriff report indicated that shortly before landing, the adult passenger in the rear seat unfastened his seat belt because two children in his lap were interfering with control stick travel.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

an improperly performed major rebuild and inadequate inspection of the aircraft by maintenance personnel. Inadequate preflight inspection by the pilot contributed to the accident.

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