A BEECH 80 ON LNDG WITH NO LNDG GEAR WARNING HORN OR UNSAFE LIGHTS ILLUMINATED. LANDED WITH THE GEAR UP.

Narrative

ON A BEAUTIFUL DAY I WAS MAKING A VISUAL APCH TO A NON CTLED ARPT (ALEXANDRIA; MN). I COMPLETED THE LNDG CHKLIST AND SEARCHED FOR OTHER POSSIBLE NON RADIO TFC AS I FLEW DOWN FINAL APCH. AS THE AIRPLANE SETTLED TO THE RWY; THE PROPS BEGAN STRIKING THE RWY. THE SUBSEQUENT SLIDE TO A STOP WAS UNEVENTFUL. UPON FURTHER INVESTIGATION I SAW THAT THE GEAR HANDLE WAS DOWN BUT THE GEAR HAD NOT MOVED TO THE DOWN AND LOCKED POS. AT NO TIME DID I HEAR A WARNING HORN. SUBSEQUENT INVESTIGATION BY MECHS REVEALED THAT ALL SYS WORKED FINE. IT IS POSSIBLE FOR A SWITCH OR CIRCUIT BREAKER TO FAIL ONCE FOR NO APPARENT REASON. BUT THAT WAS NOT WHAT CAUSED THE AIRPLANE TO BE LANDED GEAR UP. WHILE SEARCHING FOR OTHER POSSIBLE TFC IS A POSITIVE COLLISION AVOIDANCE TECHNIQUE; IT SHOULD NOT DISPLACE ATTN TO NECESSARY DUTIES IN THE COCKPIT. SOMETHING AS SIMPLE AS APPRECIATING A BEAUTIFUL EVENING CAN BECOME A DISTR. AFTER MOVING THE GEAR HANDLE DOWN; MY HAND (AND MIND) MOVED ON TO OTHER DUTIES; AND I FAILED TO VERIFY THAT THE GEAR WAS DOWN. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE MAINT ACTION PERFORMED WAS ADJUSTMENT OF THE LNDG GEAR WARNING HORN DUE TO LOW SOUND LEVEL AND WORK DONE ON THE LNDG GEAR HANDLE AND CIRCUIT. THE RPTR SAID THE ACFT HAD A PREVIOUS HISTORY OF LNDG GEAR INDICATION PROBS. THE RPTR STATES THAT NO RECHK OF THE PANEL GEAR POS INDICATION WAS MADE AFTER THE HANDLE WAS PLACED TO DOWN.