NTSB Identification: ATL89LA097.
The docket is stored on NTSB microfiche number 39119.
Accident occurred Saturday, March 04, 1989 in W. COLUMBIA, SC
Probable Cause Approval Date: 07/11/1990
Aircraft: CESSNA 180J, registration: N601RF
Injuries: 4 Uninjured.

NTSB investigators may not have traveled in support of this investigation and used data provided by various sources to prepare this aircraft accident report.

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 National Transportation Safety Board determines the probable cause(s) of this accident to be:

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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