What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
Veered left on landing. Right main folded. Wing hit rwy. Possible maintenance relator and hard landing. (.4)the pilot reported that he landed on runway 30 and suddenly felt a 'bump.' The pilot further reported that at that time the aircraft began an uncommanded yaw to the left and he noted that the right main landing gear had separated from the aircraft. The aircraft came to rest on its side. An immediate inspection of the accident site yielded no sign of debris or potholes on the runway surface. An on-site examination of the aircraft found that the bolt which attached the landing gear spring to the fuselage had been bent, fractured, and distorted at an approximate 45-degree angle, and the support assembly had also been fractured. The bolt and a portion of the separated support assembly from the right main landing gear were sent to the safety board materials laboratory for testing. Details of the examination showed that the fracture surface on the bolt revealed no evidence of progressive cracking or preexisting defects. All fracture features and deformation on the bolt pieces were consistent with an overstress under bending/tensi on loading conditions. Examination of the bracket for the support assembly was conducted with the aid of a binocular microscope and discloed the fracture features typical of a direct shear overstress separation. (-23)upon landing runway 30, aircraft rolled, then began to veer to the left. Aircraft went up on the right main landing gear, right wing tip made contact with the ground. The rightmain landing gear separated from the aircraft.
As the FAA filed it
VEERED LEFT ON LANDING. RIGHT MAIN FOLDED. WING HIT RWY. POSSIBLE MAINTENANCE RELATOR AND HARD LANDING. (.4)THE PILOT REPORTED THAT HE LANDED ON RUNWAY 30 AND SUDDENLY FELT A 'BUMP.' THE PILOT FURTHER REPORTED THAT AT THAT TIME THE AIRCRAFT BEGAN AN UNCOMMANDED YAW TO THE LEFT AND HE NOTED THAT THE RIGHT MAIN LANDING GEAR HAD SEPARATED FROM THE AIRCRAFT. THE AIRCRAFT CAME TO REST ON ITS SIDE. AN IMMEDIATE INSPECTION OF THE ACCIDENT SITE YIELDED NO SIGN OF DEBRIS OR POTHOLES ON THE RUNWAY SURFACE. AN ON-SITE EXAMINATION OF THE AIRCRAFT FOUND THAT THE BOLT WHICH ATTACHED THE LANDING GEAR SPRING TO THE FUSELAGE HAD BEEN BENT, FRACTURED, AND DISTORTED AT AN APPROXIMATE 45-DEGREE ANGLE, AND THE SUPPORT ASSEMBLY HAD ALSO BEEN FRACTURED. THE BOLT AND A PORTION OF THE SEPARATED SUPPORT ASSEMBLY FROM THE RIGHT MAIN LANDING GEAR WERE SENT TO THE SAFETY BOARD MATERIALS LABORATORY FOR TESTING. DETAILS OF THE EXAMINATION SHOWED THAT THE FRACTURE SURFACE ON THE BOLT REVEALED NO EVIDENCE OF PROGRESSIVE CRACKING OR PREEXISTING DEFECTS. ALL FRACTURE FEATURES AND DEFORMATION ON THE BOLT PIECES WERE CONSISTENT WITH AN OVERSTRESS UNDER BENDING/TENSI ON LOADING CONDITIONS. EXAMINATION OF THE BRACKET FOR THE SUPPORT ASSEMBLY WAS CONDUCTED WITH THE AID OF A BINOCULAR MICROSCOPE AND DISCLOED THE FRACTURE FEATURES TYPICAL OF A DIRECT SHEAR OVERSTRESS SEPARATION. (-23)UPON LANDING RUNWAY 30, AIRCRAFT ROLLED, THEN BEGAN TO VEER TO THE LEFT. AIRCRAFT WENT UP ON THE RIGHT MAIN LANDING GEAR, RIGHT WING TIP MADE CONTACT WITH THE GROUND. THE RIGHTMAIN LANDING GEAR SEPARATED FROM THE AIRCRAFT.
NTSB investigation
The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.
Other reports on N4498C · 2
Matched to the same aircraft by N-number and date.