Casualties unknown

Landing Accident Due to Missing Wheel Retaining Hardware (N1953P)

Roberts, ID, US

On September 30, 1995, a Piper PA-18A (registration N1953P) operated by Linden J. Butikofer was involved in an aviation accident near Roberts, ID. Investigators recorded the probable cause as: an improperly performed major rebuild and inadequate inspection of the aircraft by maintenance personnel. Inadequate preflight inspection by the pilot contributed to the accident. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 2026-06-10Data APIEditorial standards

During landing on a private airstrip, the left main wheel separated, causing the aircraft to nose over. Investigation revealed missing hardware and a passenger unbuckling due to children interfering with controls.

Overview

A pilot reported that while landing on his private airstrip, the left main wheel separated from the aircraft, leading to the aircraft nosing over. The incident occurred shortly after takeoff, but details of the flight duration were not specified.

Investigation Findings

According to a county sheriff report, the left main wheel retaining nut and cotter pin were missing from the axle. Additionally, the right main wheel retaining nut lacked a cotter pin. The report highlighted these hardware deficiencies as key observations.

Inspection and Maintenance

The airplane had undergone a major rebuild and annual inspection approximately five months before the accident, accumulating only 12 flight hours since that work. 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.

Passenger Actions

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 sitting in his lap were interfering with control stick travel. The impact of this action on the sequence of events was not specified in the source.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001207X04616. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.