Casualties unknown

1992-10-15: Cessna 172RG (N9797B) — Volunteer Flight Training — Clarksville, TN

Clarksville, TN, US

On October 15, 1992, a Cessna 172RG (registration N9797B) operated by Volunteer Flight Training was involved in an aviation accident near Clarksville, TN. Investigators recorded the probable cause as: The shearing of the section gear in the pivot assembly of the landing gear mechanism. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive; 1 related events involving the same aircraft type or operator are linked below.

Sourcesthe U.S. National Transportation Safety Board (NTSB) historical archivePrimary reportUpdated 1781061362Data APIEditorial standards

During a local training flight, the pilot experienced difficulty lowering the landing gear. The left main gear failed to extend, and investigation revealed a sheared section gear in the pivot assembly.

What happened

The flight was conducted as a local training exercise. As the pilot prepared to conclude the mission and initiate the landing sequence, an issue arose with the aircraft's landing gear system. Specifically, when the pilot attempted to lower the gear, the left main landing gear failed to extend fully into its locked position.

The investigation

Following the incident, a thorough examination of the landing and retraction mechanism was conducted to determine the root cause of the malfunction. The inspection focused on the mechanical components responsible for deploying and securing the gear.

Findings

The technical analysis revealed that a critical component within the landing gear assembly had failed. Specifically, the section gear located in the pivot assembly had sheared off. This mechanical failure prevented the left main gear from completing its extension cycle, leaving it unable to lock into place for a safe landing.

Probable cause

The shearing of the section gear in the pivot assembly of the landing gear mechanism.

Investigation report by the U.S. National Transportation Safety Board (NTSB) historical archive. Original record: https://carol.ntsb.gov/event/20001211X15814. This page is a structured re-presentation; facts and quotes are in the National Transportation Safety Board (NTSB), United States.