Narrative:

On feb/wed/96 I was returning from washing my aircraft, a 1947 bonanza, in columbus, mt. It had become apparent that a great deal of static was interfering with my communication xmissions as was reported when landing at columbus from the FBO at the field. The destination airport was in laurel, mt. The time was approximately XA00 MST. After listening to the billings broadcaster ATIS, I began normal descent into a landing traffic pattern for landing on runway 22. I announced entering the downwind leg for runway 22 and began gump preparations, which included switching the landing gear to the down position. Adjustment was made to pitch. I noticed I was required to 'microphone' the runway lights twice in order to get them to light up as I intended to use the VASI for final. I announced base and final legs twice each. The landing gear warning light (red) on the dash was out and no warning horn sound was made. I landed the airplane on its belly. There was no fire or injury. The FAA was contacted and reports are being filed. Besides replacing the propellers and other damaged parts, the entire electrical system will be thoroughly inspected for shorts. The landing gear and the gear motor will be inspected for wear. It is possible that the washing of the plane may have caused a short. The warning horn will be repaired. The circuit breaker and the panel will be inspected for age deterioration. A light that shows the mechanical position of the gear will be added (or replaced) to continuously show gear position while in-flight. I personally will go through an aggressive retesting of my landing procedures to prevent further incidents or accidents.

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Original NASA ASRS Text

Title: GEAR WARNING SYS INOP, LANDED GEAR UP.

Narrative: ON FEB/WED/96 I WAS RETURNING FROM WASHING MY ACFT, A 1947 BONANZA, IN COLUMBUS, MT. IT HAD BECOME APPARENT THAT A GREAT DEAL OF STATIC WAS INTERFERING WITH MY COM XMISSIONS AS WAS RPTED WHEN LNDG AT COLUMBUS FROM THE FBO AT THE FIELD. THE DEST ARPT WAS IN LAUREL, MT. THE TIME WAS APPROX XA00 MST. AFTER LISTENING TO THE BILLINGS BROADCASTER ATIS, I BEGAN NORMAL DSCNT INTO A LNDG TFC PATTERN FOR LNDG ON RWY 22. I ANNOUNCED ENTERING THE DOWNWIND LEG FOR RWY 22 AND BEGAN GUMP PREPARATIONS, WHICH INCLUDED SWITCHING THE LNDG GEAR TO THE DOWN POS. ADJUSTMENT WAS MADE TO PITCH. I NOTICED I WAS REQUIRED TO 'MIKE' THE RWY LIGHTS TWICE IN ORDER TO GET THEM TO LIGHT UP AS I INTENDED TO USE THE VASI FOR FINAL. I ANNOUNCED BASE AND FINAL LEGS TWICE EACH. THE LNDG GEAR WARNING LIGHT (RED) ON THE DASH WAS OUT AND NO WARNING HORN SOUND WAS MADE. I LANDED THE AIRPLANE ON ITS BELLY. THERE WAS NO FIRE OR INJURY. THE FAA WAS CONTACTED AND RPTS ARE BEING FILED. BESIDES REPLACING THE PROPS AND OTHER DAMAGED PARTS, THE ENTIRE ELECTRICAL SYS WILL BE THOROUGHLY INSPECTED FOR SHORTS. THE LNDG GEAR AND THE GEAR MOTOR WILL BE INSPECTED FOR WEAR. IT IS POSSIBLE THAT THE WASHING OF THE PLANE MAY HAVE CAUSED A SHORT. THE WARNING HORN WILL BE REPAIRED. THE CIRCUIT BREAKER AND THE PANEL WILL BE INSPECTED FOR AGE DETERIORATION. A LIGHT THAT SHOWS THE MECHANICAL POS OF THE GEAR WILL BE ADDED (OR REPLACED) TO CONTINUOUSLY SHOW GEAR POS WHILE INFLT. I PERSONALLY WILL GO THROUGH AN AGGRESSIVE RETESTING OF MY LNDG PROCS TO PREVENT FURTHER INCIDENTS OR ACCIDENTS.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.