# NTSB DEN04CA054: Cessna T310R, N3465G, Broomfield, CO, March 21, 2004 - Type: NTSB accident investigation - Classification: Accident · No injuries · Data collection · Final report - Date: March 21, 2004, 12:00 local (19:00 UTC) - Place: Broomfield, CO - Coordinates: 39.908332, -105.116668 - Nearby events: https://openairdocs.org/map.md?lat=39.9083&lon=-105.1167&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 1 uninjured - Status: Completed, report June 30, 2004 - Report: Approved by Office Director - Parties: FAA FSDO - NTSB case key (mKey): 58980 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN04CA054 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/58980/pdf - Page: https://openairdocs.org/ntsb/DEN04CA054 ## Probable cause the pilot's improper in-flight planning/decision and his failure to verify the landing gear position. Factors contributing to the accident were the pilot's diverted attention due to the electrical failure. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Wheels up landing, landing - flare/touchdown - in-flight planning/decision - improper, pilot in command (cause) - gear extension - not verified, pilot in command (cause) - diverted attention, pilot in command (contributing factor) - electrical system - failure (contributing factor) - wheels up landing - inadvertent, pilot in command ## Analysis According to the pilot, he had been experiencing electrical problems for the majority of his flight. The pilot reported that he entered a downwind for runway 29R, lowered his landing gear and set 15 degrees flaps. The pilot noticed that the flap indicator was not down so he raised the flaps lever to avoid problems later. The pilot did not visually verify that his gear was down. During the landing flare, both propellers came in contact with the ground and the airplane slid along the runway for several hundred feet, substantially damaging a bulkhead. ## Factual narrative On March 21, 2004, at approximately 1200 mountain standard time, a Cessna T310R, N3465G, was substantially damaged during a gear-up landing at Jefferson County Airport (BLC), Broomfield, Colorado. The private pilot, the sole occupant on board, was not injured. Visual meteorological conditions prevailed. A visual flight rules flight plan had been filed for the flight being conducted under the provisions of Title 14 CFR Part 91. The cross-country flight had departed Granby, Colorado, at approximately 1100. According to the pilot, he had been experiencing electrical problems for the majority of his flight. Upon arriving at BJC, he was unable to communicate with the tower and entered a traffic pattern for runway 29R and began to look for light gun signals. He stated that he had extended the flaps to 15 degrees and verified via a checklist that the gear was down. When he turned final, he noticed an airplane on the runway and initiated a go-around. The pilot said that he entered a downwind for runway 29R for a second time, "lowered his landing gear and set 15 [degrees] flaps." The pilot "noticed that the flap indicator was not down," so he raised the flaps lever to avoid problems later. The pilot did not visually verify that his gear was down. During the landing flare, both propellers came in contact with the runway and the airplane slid along the runway for several hundred feet, substantially damaging a bulkhead. ## Aircraft - Registration: [N3465G](https://openairdocs.org/aircraft/N3465G), registered now, S/N 310R0844 (OpenAirDocs) - Reported make and model: Cessna T310R - Registry model: [Cessna T310R](https://openairdocs.org/model/cessna-t310r) (registry code 2074246) (OpenAirDocs) - Category: Airplane - Serial number: 310R0844 - Airframe hours: 3014 - Engines: Teledyne Continental TSIO-520-B-C 300 horsepower reciprocating; Teledyne Continental TSIO-520-B-C 300 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Conn-Behr Aircraft LLK - Airworthiness certificate: Standard, Normal - Last inspection: Annual, February 12, 2004, 29 hours before - Departed: GNB, Grandby, CO - Destination: BJC, Broomfield, CO - Flight plan: VFR - Airport: BJC, Jeffco, runway 29R, 9,000 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; injuries: none; private; airplane ratings: multi-engine land, single-engine sea, single-engine land; medical: class 3, valid medical--w/ waivers/lim; last flight review March 18, 2004; seat: left; flight hours: 310 total, 37 in this make and model, 199 as pilot in command, 82 in the last 90 days, 34 in the last 30 days, 2 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: variable at 5 knots - Visibility: 50 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 23 °F - Altimeter: 30.32 inHg - Observed at: BJC, 1 nm away ## FAA reports on this event (1) The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs). - [Accident 20040321008499A](https://openairdocs.org/incident/20040321008499A), Mar 21, 2004: Cessna T310R, Denver, CO, Substantial damage. (-23) Pilot departed grandby co (gnb) on descent autopilot would not follow a controlled descent. He flew the aircraft manually to a descent into fort collins… From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.