IMPROPER TORQUING OF THE ATTACHMENT BOLT DURING INSTALLATION BY UNKNOWN PERSON(S), WHICH RESULTED IN THE SEPARATION OF THE BOLT AND NUT AND SUBSEQUENT SEPARATION OF THE MAIN LANDING GEAR FROM THE AIRPLANE.
— NTSB Determination
THE RT MAIN LANDING GEAR COLLAPSED AND SEPARATED FROM THE AIRPLANE DURING LDG ROLLOUT. EXAMINATION REVEALED THAT THE AN7-20A ATTACHMENT BOLT & MS20365-720C NUT HAD STRIPPED & SEPARATED. THE BOLT EXHIBITED EVIDENCE OF HAVING BEEN LOOSE PRIOR TO THE FAILURE. EXAMINATION OF THE AIRPLANE LOGS REVEALED NO ENTRIES PERTAINING TO RT MLG MAINTENANCE, OR ANY AIRFRAME REPAIRS, WHICH WOULD HAVE REQUIRED REMOVAL & REINSTALLATION OF THE GEAR.
THE RT MAIN LANDING GEAR COLLAPSED AND SEPARATED FROM THE AIRPLANE DURING LDG ROLLOUT. EXAMINATION REVEALED THAT THE AN7-20A ATTACHMENT BOLT & MS20365-720C NUT HAD STRIPPED & SEPARATED. THE BOLT EXHIBITED EVIDENCE OF HAVING BEEN LOOSE PRIOR TO THE FAILURE. EXAMINATION OF THE AIRPLANE LOGS REVEALED NO ENTRIES…
The accident on 1989-03-04 involved a Cessna 180J, registration N601RF, operated by Fox, Reese E., at W. Columbia, SC.
IMPROPER TORQUING OF THE ATTACHMENT BOLT DURING INSTALLATION BY UNKNOWN PERSON(S), WHICH RESULTED IN THE SEPARATION OF THE BOLT AND NUT AND SUBSEQUENT SEPARATION OF THE MAIN LANDING GEAR FROM THE AIRPLANE.
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