Narrative:

IFR flight plan filed. Departed VFR and picked up clearance. Uneventful flight and VFR conditions maintained throughout 1.2 hour flight. Attempts to activate prop deice equipment unsuccessful with deice switch tripping back to off position. This may have caused two or more circuit breakers to pop. With high ceiling and greater than 10 mi vis in occasional showers IFR flight plan canceled with VFR flight following. Normal approach to landing was achieved mild turbulence on base on final approach. Final power; flaps and gear were set and normal approach speeds achieved. My 10 year old son in copilot seat asked [me] repeatedly to turn off electronic device emitting flashing light in the cockpit during right base which did occur but was distracting. On short final pilot (me) failed to check gear indicator lights and landing was performed in gear up position. Gear up was discovered in the flare in ground effect and time and safety did not permit a go around. The plane came to rest slightly right of centerline after sliding approximately 800 feet with no other airplanes in or around the airport environment. The standard evacuation procedures were followed after the soft landing with damage limited to the propellers and underbelly aircraft skin. Airport management was notified; the airport immediately shut down; including runway edge lighting and emergency lighting placed to prevent other aircraft from attempting to land. All shutdown procedures were performed by poh including fuel and electrical shut off. Careful inspection showed no leakage of fuel or evidence of electrical problems. Cabin inspection showed 3 circuit breakers blown including deice and gear circuit breaker. Gear handle in down position. Low power/flaps warning horn failed to activate on final approach. No injuries or runway damage was observed and with a properly trained crane team the plane was elevated; inspected for fuel or other dangerous conditions and none were found. The cbs were reset and battery turned on and gear deployed and locked normally. The aircraft was towed to hangar without event. This incident was the result of a chain of failures: 1) unknown inoperative gear up warning horn 2) apparent electrical failure of gear and prop deice and possible other circuit breakers 3) pilot distraction with low light; turbulence and deteriorating weather conditions and lack of proper assurance that gear lock lights were illuminated. Plans will be: 1) additional pilot training and flight safety with focus on flow checks; check list usage and minimizing cockpit distractions well in advance of the airport environment. 2) another careful review with children about sterile cockpit in airport environment and 3) with planned repairs a recommended new gear up GPS-altitude-based warning system will be installed and all electrical circuits will be checked for shorts and proper wiring. Factory gear up warning horn will also be checked and repaired if needed. The chain of events; unknown electrical and equipment failure (these were not inop on annual performed 4 months prior); pilot distraction; failure of pilot to properly perform final gumps check resulted in this incident. Weather and turbulence were well within pilot's comfort levels and runway conditions were excellent. Plane is fully equipped with 1 year old avionics overhaul glass cockpit G500; 430WAAS; 2 ILS receivers; TCAS and wx radar and meticulously maintained.

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Original NASA ASRS Text

Title: A C310 pilot landed gear up when he failed to check for three green. Landing gear CB had popped unnoticed earlier in the flight.

Narrative: IFR flight plan filed. Departed VFR and picked up clearance. Uneventful flight and VFR conditions maintained throughout 1.2 hour flight. Attempts to activate prop deice equipment unsuccessful with deice switch tripping back to off position. This may have caused two or more circuit breakers to pop. With high ceiling and greater than 10 mi vis in occasional showers IFR flight plan canceled with VFR flight following. Normal approach to landing was achieved mild turbulence on base on final approach. Final power; flaps and gear were set and normal approach speeds achieved. My 10 year old son in copilot seat asked [me] repeatedly to turn off electronic device emitting flashing light in the cockpit during right base which did occur but was distracting. On short final pilot (me) failed to check gear indicator lights and landing was performed in gear up position. Gear up was discovered in the flare in ground effect and time and safety did not permit a go around. The plane came to rest slightly right of centerline after sliding approximately 800 feet with no other airplanes in or around the airport environment. The standard evacuation procedures were followed after the soft landing with damage limited to the propellers and underbelly aircraft skin. Airport management was notified; the airport immediately shut down; including runway edge lighting and emergency lighting placed to prevent other aircraft from attempting to land. All shutdown procedures were performed by POH including fuel and electrical shut off. Careful inspection showed no leakage of fuel or evidence of electrical problems. Cabin inspection showed 3 circuit breakers blown including deice and gear CB. Gear handle in down position. Low power/flaps warning horn failed to activate on final approach. No injuries or runway damage was observed and with a properly trained crane team the plane was elevated; inspected for fuel or other dangerous conditions and none were found. The CBs were reset and battery turned on and gear deployed and locked normally. The aircraft was towed to hangar without event. This incident was the result of a chain of failures: 1) unknown inoperative gear up warning horn 2) apparent electrical failure of gear and prop deice and possible other circuit breakers 3) pilot distraction with low light; turbulence and deteriorating weather conditions and lack of proper assurance that gear lock lights were illuminated. Plans will be: 1) additional pilot training and flight safety with focus on flow checks; check list usage and minimizing cockpit distractions well in advance of the airport environment. 2) Another careful review with children about sterile cockpit in airport environment and 3) with planned repairs a recommended new gear up GPS-altitude-based warning system will be installed and all electrical circuits will be checked for shorts and proper wiring. Factory gear up warning horn will also be checked and repaired if needed. The chain of events; unknown electrical and equipment failure (these were not inop on annual performed 4 months prior); pilot distraction; failure of pilot to properly perform final GUMPS check resulted in this incident. Weather and turbulence were well within pilot's comfort levels and runway conditions were excellent. Plane is fully equipped with 1 year old avionics overhaul glass cockpit G500; 430WAAS; 2 ILS receivers; TCAS and wx radar and meticulously maintained.

Data retrieved from NASA's ASRS site as of April 2012 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.