On March 16, 1983, a Piper PA-31T1 (registration N879SW) was involved in an aviation accident near Oklahoma City, OK. This summary draws on records from the U.S. National Transportation Safety Board (NTSB) historical archive.
After landing, a pilot retracted flaps to zero, which triggered unintended landing gear retraction. The aircraft slid to a stop on the runway. Subsequent tests found no malfunctions in the gear system.
Incident Description
During an instrument landing system (ILS) approach, witnesses observed the landing gear being lowered at the outer marker. The pilot reported extending full flaps at approximately 400 feet above ground level, just as the aircraft broke out of the clouds. Immediately after touchdown, the pilot retracted the flaps to the zero position. As the flaps retracted, the nose of the aircraft dropped and the landing gear retraction cycle began. The main landing gear subsequently retracted, and the aircraft slid to a stop on the runway.
Investigation Findings
When the aircraft was moved to a hangar, all landing gear were found to be in the up and locked position. Extensive cycle testing of the landing gear system was conducted, but no malfunctions were identified in any component of the system.
Frequently asked questions
What happened in the 16 Mar 1983 Piper PA-31T1 accident near Oklahoma City, OK?
After landing, a pilot retracted flaps to zero, which triggered unintended landing gear retraction. The aircraft slid to a stop on the runway. Subsequent tests found no malfunctions in the gear system.
What aircraft was involved and where did it happen?
The accident on 16 Mar 1983 involved a Piper PA-31T1, registration N879SW, at Oklahoma City, OK.
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