What happened
The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.
(-23) Upon approach to Knoxville, TN the Beechcraft 200, operating under FAR 135, landing gear indicator (lights) indicated that landing gear was not locked in the down position. Pilot checked lights and proceeded with emergency procedures for unsafe gear warning. This included a fly by the tower and manual extension. Neither of these rectified the problem. After "another" fly by the pilots circled and set the aircraft up for landing. Once the runway was made propellers were feathered and touchdown completed. The left landing gear immediately collapsed causing the aircraft to slide off center line. No injuries occurred during the evacuation. Investigation showed that tapered pin in torque tube had fallen out and from all evidence the nut on the end of the pin was improperly installed. In addition, a second tapered pin was found lying in the wing along with a circular cut where a clamp was rubbing against the torque tube. This would have eventually caused gear failure.
As the FAA filed it
(-23) UPON APPROACH TO KNOXVILLE, TN THE BEECHCRAFT 200, OPERATING UNDER FAR 135, LANDING GEAR INDICATOR (LIGHTS) INDICATED THAT LANDING GEAR WAS NOT LOCKED IN THE DOWN POSITION. PILOT CHECKED LIGHTS AND PROCEEDED WITH EMERGENCY PROCEDURES FOR UNSAFE GEAR WARNING. THIS INCLUDED A FLY BY THE TOWER AND MANUAL EXTENSION. NEITHER OF THESE RECTIFIED THE PROBLEM. AFTER "ANOTHER" FLY BY THE PILOTS CIRCLED AND SET THE AIRCRAFT UP FOR LANDING. ONCE THE RUNWAY WAS MADE PROPELLERS WERE FEATHERED AND TOUCHDOWN COMPLETED. THE LEFT LANDING GEAR IMMEDIATELY COLLAPSED CAUSING THE AIRCRAFT TO SLIDE OFF CENTER LINE. NO INJURIES OCCURRED DURING THE EVACUATION. INVESTIGATION SHOWED THAT TAPERED PIN IN TORQUE TUBE HAD FALLEN OUT AND FROM ALL EVIDENCE THE NUT ON THE END OF THE PIN WAS IMPROPERLY INSTALLED. IN ADDITION, A SECOND TAPERED PIN WAS FOUND LYING IN THE WING ALONG WITH A CIRCULAR CUT WHERE A CLAMP WAS RUBBING AGAINST THE TORQUE TUBE. THIS WOULD HAVE EVENTUALLY CAUSED GEAR FAILURE.
Other reports on N561SS · 3
Matched to the same aircraft by N-number and date.