Date: 202002
Local time of day: 1801-2400
Location: ZZZ.Tower, US
Flight conditions: VMC
Light: Daylight
Aircraft: Cessna 310/T310C
Operator: Personal
Operating under: Part 91
Flight plan: VFR
Mission: Personal
Flight phase: Landing
Airspace: Class D ZZZ
ATC / advisory: Tower ZZZ
Reporter organization: Personal
Reporter function: Single Pilot; Pilot Flying
Reporter qualification: Flight Crew Multiengine; Flight Crew Instrument
Human factors: Distraction; Situational Awareness
Second reporter function: Pilot Not Flying
Anomaly: Ground Event / Encounter Gear Up Landing
Detector: Person Flight Crew; Person Observer
When detected: Other Landing
Result: Aircraft Aircraft Damaged; General Evacuated
Contributing factors: Aircraft; Human Factors
Primary problem: Human Factors

Narrative: I was doing touch and go's. The first two touch and go's were uneventful. The last landing was intended to be another touch and go. I put the landing gear lever in the down position once cleared for the option and selected flaps 1. Once on final I positioned the props and mixtures to full forward. When I retarded the throttles I heard a beeping noise and looked at my airspeed indicator. I added some power assuming the stall warning horn was indicating a low airspeed and the beeping went away. On short final I again retarded the throttles and the beeping came back. I again looked at my airspeed indicator; in the flare I was still trying to mentally process the beeping and concentrate on the landing phase of flight. The aircraft then touched down with a unusual noise but smooth. Once on the ground I thought that I had a flat tire because the aircraft started to veer a little and there was a metal grinding noise. My first mental indication that the gear was not down and locked was when the aircraft started to slide slightly and I no longer had directional control. Once the aircraft came to a complete stop I then shut the aircrafts mags and master. I then instructed my passenger to egress the aircraft and we both walked to the side of the runway.


Second narrative: I was riding with a friend in his CE-310 doing touch and go's. The aircraft had been sitting for a month or so and he wanted to exercise the aircraft to move the fluids and make sure that it would be ready for a flight he was planning next weekend. after a thorough preflight there were no visible issues with the aircraft. The run-up was successively completed with no indications that the flight could not be conducted safely. The first two touch and go's were uneventful. The last landing the pilot was cleared for the option and I believe I saw him put the landing gear lever down and select flaps. On final I heard a brief beeping in the cockpit but then it went away. On short final the aircraft was on stable approach. As we approached the threshold in the round out the beeping came back; upon touch down there was a strange noise like metal scraping and the aircraft started to drift to one side almost slightly sideways. I believe I heard the pilot say I think we have a flat. The landing was very smooth and at first and nothing seemed out of the ordinary. As the aircraft began to slid I looked out the window and noticed that the props were not turning and that they were bent; that is when I realized that we were sliding on the belly of the aircraft.


Synopsis: Cessna 310 pilot reported a gear-up landing.