VAN NUYS, CA, USA
N6023S
BEECH B-60
DURING LANDING ROLL OUT THE PLT OBSERVED THE ACFT'S NOSE GEAR BEGIN TO COLLAPSE. ALTHOUGH ON APPROACH THE PLT HAD PLACED THE LDG GEAR SELECTOR IN THE DOWN POSITION & HAD OBSERVED THE ILLUMINATION OF THE GREEN GEAR DOWN LIGHTS, THE PLT RESPONDED TO THE SITUATION OF A COLLAPSING NOSE GEAR BY RECYCLING THE GEAR SELECTOR. THIS ACTION ENERGIZED THE GEAR MOTOR AND THE MAINS RETRACTED. THE ACFT VEERED OFF THE RWY AND OVERRAN A SIGN AND TWO RUNWAY LIGHTS WHICH COLLISION SUBSTANTIALLY DAMAGED THE ACFT. SUBSEQUENT EXAMINATION REVEALED THAT THE NOSE GEAR RETRACTION LINK LOCK WASHER TAB HAD BROKEN. THE ASSOCIATED ADJUSTING NUT HAD BACKED OFF REDUCING TENSION TO THE NOSE GEAR DOWN SPRING THUS ALLOWING THE NOSE GEAR TO COLLAPSE. ALSO, THE MAIN GEAR SAFETY SWITCH WAS OUT OF ADJUSTMENT SUCH THAT THE GEAR COULD BE COMMANDED TO RETRACT WITH MORE WEIGHT ON THE WHEELS THAN NORMAL.
Source: NTSB Aviation Accident Database
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