PA34-200 PLT UNABLE TO GET A GREEN LIGHT FOR NOSE GEAR EXTENSION. CHANGED LIGHT BULB WITH NO CHANGE. RECYCLED GEAR 5 TIMES WITH NO CHANGE. NOSE GEAR COLLAPSE ON LNDG.

Narrative

THE PROB WAS NOTICED WHEN I EXTENDED THE GEAR AND GOT ONLY 2 GREEN LIGHTS (MAIN) WITH VISUAL INDICATION OF THE NOSE GEAR BEING DOWN. CHANGING THE LIGHT BULBS TO CHK; THE LIGHT BULBS YIELDED THE SAME RESULT. WHEN PWR WAS REDUCED THE GEAR WARNING HORN SOUNDED. 5 ATTEMPTS WERE MADE TO RECYCLE THE GEAR. WITH EACH ATTEMPT THE NOSE GEAR DID NOT MOVE. THE GEAR FAILURE CHKLIST WAS THEN FOLLOWED. EVEN THE EMER GEAR EXTENSION HAD NO EFFECT. UPON TOUCHING DOWN ON THE MAINS AND HOLDING THE NOSE GEAR OFF; THE ENGS WERE SHUT OFF. WHEN THE NOSE TOUCHED DOWN IT DID NOT HOLD. THE AIRPLANE SLID TO A STOP ON 2 WHEELS AND THE NOSE. THERE WERE NO INJURIES OF THE 5 PEOPLE ON BOARD. THE CAUSE OF THIS PROB WAS THE FAILURE OF THE NOSE GEAR TO LOCK INTO PLACE. THIS I NOW UNDERSTAND IS A COMMON PROB IN THIS ACFT. MAYBE A COMPREHENSIVE AIRWORTHINESS DIRECTIVE MIGHT FIX THE PROB. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATES THAT HE CONTACTED FAA AND FILED A RPT. HE HAS HEARD NOTHING FURTHER. HIS INFO REGARDING OTHER SUCH FAILURES CAME FROM THE INSURANCE ADJUSTER WHO WORKED ON THE CLAIM AND FROM OTHER PLTS WHO HAVE A GREAT DEAL OF EXPERIENCE IN THE PA34-200. HE DOES NOT KNOW IF THE FBO FROM WHOM HE RENTED THE ACFT HAS DONE ANY FOLLOW UP WITH THE MANUFACTURER.