NTSB Identification: MKC83IA036
14 CFR Part 91: General Aviation
Incident occurred Monday, December 13, 1982 in CHESTERFIELD, MO
Probable Cause Approval Date: 12/13/1983
Aircraft: BEECH B200, registration: N6338T
Injuries: 4 Uninjured.
NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.
UPON ARRIVAL OVER CHICAGO, IL, THE CREW DISCOVERED THAT THE LANDING GEAR WOULD NOT EXTEND. AFTER NUMEROUS UNSUCCESSFUL ATTEMPTS TO LOWER THE GEAR, THE CREW ELECTED TO RETURN TO THEIR HOME BASE AIRPORT AND MAKE A GEAR UP LANDING. THE LANDING WAS SUCCESSFUL AND THERE WERE NO INJURIES. INVESTIGATION REVEALED THAT A LOCKING NUT HAD BACKED OFF A TAPERED PIN AT THE INBOARD UNIVERSAL JOINT IN THE LEFT MAIN GEAR EXTENSION/RETRACTION TORQUE TUBE. THIS ALLOWED THE TAPERED PIN TO BACK OUT, DISCONNECTING THE TORQUE TUBE FROM THE GEAR DRIVE MOTOR. NO EVIDENCE OF FACTORY TORQUE STRIPPING WAS FOUND ON THE NUT.
The National Transportation Safety Board determines the probable cause(s) of this incident to be:LANDING GEAR,NORMAL RETRACTION/EXTENSION ASSEMBLY..DISCONNECTED
The National Transportation Safety Board determines the probable cause(s) of this incident to be:GEAR EXTENSION..NOT POSSIBLE
INADEQUATE QUALITY CONTROL..MANUFACTURER
WHEELS UP LANDING..PERFORMED
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