On June 5, 2002, a Beech BE-100-A100 (registration N799DD) was involved in an aviation accident near Little Rock, AR. Investigators recorded the probable cause as: The malfunction of the left main landing gear retraction/extension assembly due to a missing lock pin/washer/nut on the clevis of the push/pull gear extension tube that resulted from improper maintenance. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
During a practice approach, a pilot extended landing gear but received only two green indications. After go-around and unsuccessful gear cycling, a landing was made with left main gear retracted, leading to a runway excursion. Investigation found a missing lock pin in the left gear extension push/pull tube.
Event Description
During a practice approach, the pilot extended the landing gear. The cockpit gear indicators displayed two green lights, indicating that two of the three landing gear were down and locked. The pilot initiated a go-around and cycled the landing gear several times without success, including an attempt to use the emergency extension system. Two confirmation passes were performed, confirming that the left main landing gear remained retracted while the nose and right main landing gear were extended. Upon touchdown on the right side of the runway, the aircraft veered left and exited the runway surface.
Investigation Findings
An examination of the aircraft revealed that the left main landing gear extension push/pull tube was found without its lock pin in the clevis. The missing lock pin was located in the belly of the aircraft, but no corresponding nut and washer were found. The aircraft had recently undergone maintenance involving the landing gear system prior to the incident.
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