# NTSB DEN05LA086: Beech S35, N9TT, Broomfield, CO, June 7, 2005 - Type: NTSB accident investigation - Classification: Accident · Minor injuries · Limited investigation · Final report - Date: June 7, 2005, 17:25 local (23:25 UTC) - Place: Broomfield, CO - Coordinates: 39.934722, -105.934722 - Nearby events: https://openairdocs.org/map.md?lat=39.9347&lon=-105.9347&mi=10 - Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping) - Highest injury: Minor injuries - Injuries: 1 minor - Status: Completed, report October 27, 2005 - Report: Approved by Office Director - Parties: FAA Flight Standards District Office - NTSB case key (mKey): 61660 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN05LA086 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61660/pdf - Page: https://openairdocs.org/ntsb/DEN05LA086 ## Probable cause the pilot's failure to maintain adequate airspeed which resulted in a stall, and his failure to abort the takeoff. The loss of power for undetermined reasons is a contributing factor. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power(partial) - nonmechanical, takeoff - reason for occurrence undetermined (contributing factor) - Loss of control - in flight, takeoff - aborted takeoff - not performed, pilot in command (cause) - airspeed - not maintained, pilot in command (cause) - stall/mush - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis The pilot stated that he became airborne approximately midfield; however, "after rising a few feet, the acceleration seemed sluggish." He also stated that at midfield he "noticed a drop in power," but continued with the take off. The pilot stated that the airplane settled towards the runway, "accelerat[ed] and rose again." He stated that the stall warning horn sounded, and he "leveled in ground effect to accelerate." He maneuvered the airplane to avoid the runway end lights and a truck on the service road off the end of the runway. The airplane impacted the ground near the service road and nosed over causing substantial damage. An examination of the engine revealed no anomalies that would have precluded the engine from producing power. ## Factual narrative On June 7, 2005, approximately 1725 mountain daylight time, a Beech S35, N9TT, piloted by a private pilot, was substantially damaged when it impacted terrain off the departure end of runway 11L at the Jefferson County Airport (BJC), Broomfield, Colorado. Visual meteorological conditions prevailed at the time of the accident. The personal flight was being conducted under the provisions of Title 14 CFR Part 91 without a flight plan. The private pilot sustained minor injuries. The local flight was originating at the time of the accident. According to the BJC Air Traffic Control Tower, the pilot had been cleared for take off on runway 11L. Several witnesses reported that during the departure roll, the airplane appeared to take off, settle back to the runway, take off again, and settle back to the runway. One witness stated that the pilot appeared to abort the takeoff. According to the accident report submitted by the pilot, he had taxied down the runway, past the alpha 16 intersection, to avoid several hawks in the vicinity of the runway. According to the Jefferson County Airport Control Tower, the remaining runway distance at this intersection is 7,200 feet. The pilot stated that he became airborne approximately midfield; however, "after rising a few feet, the acceleration seemed sluggish." He also stated that at midfield he "noticed a drop in power," but continued with the take off. The pilot stated that the airplane settled towards the runway, "accelerat[ed] and rose again." He stated that the stall warning horn sounded, and he "leveled in ground effect to accelerate." He maneuvered the airplane to avoid the runway end lights and a truck on the service road off the end of the runway. The airplane impacted the ground near the service road and nosed over, coming to rest 1,287 feet from the departure end of the runway. The outboard leading edge of the left wing was bent down, the nose landing gear wheel and tire assembly separated at the strut, the top portion of the fuselage was wrinkled, and the windscreen Plexiglas fragmented. The airplane was relocated to Greeley, Colorado, for further examination. On June 14, 2005, the engine was test run under the auspices of the Federal Aviation Administration. No anomalies were noted that would have precluded the engine from producing power. An examination of the remaining airplane systems revealed no anomalies. ## Aircraft - Registration: [N9TT](https://openairdocs.org/deregistered/N9TT-2025-12-04), registration cancelled 2025-12-04, S/N D-7800, built 1965 (OpenAirDocs) - Reported make and model: Beech S35 - Registry model: [Beech S35](https://openairdocs.org/model/beech-s35) (registry code 1151532) (OpenAirDocs) - Registry engine: [Continental IO-520 series](https://openairdocs.org/engine/continental-io-520-series) (registry code 17032, reciprocating) (OpenAirDocs) - Category: Airplane - Serial number: D-7800 - Airframe hours: 5200 - Engines: Lycoming IO-5203A 285 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: V-Tail Aviation LLC - Airworthiness certificate: Standard, Normal - Last inspection: Annual, July 1, 2004, 75 hours before - Departed: BJC, Broomfield, CO - Destination: BJC, Broomfield, CO - Airport: BJC, Jeffco, runway 11L, 9,000 × 100 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 49; injuries: minor; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3; last flight review May 1, 2004; seat: left; flight hours: 680 total, 39 in this make and model, 505 as pilot in command, 13 in the last 90 days, 13 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 20° at 8 knots - Visibility: 40 statute miles - Lowest ceiling: 12,000 ft broken - Temperature: 75 °F, dew point 46 °F - Altimeter: 29.70 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 20050607014069A](https://openairdocs.org/incident/20050607014069A), Jun 7, 2005: Beech S35, Denver, CO, Substantial damage. (-23) Aircraft was attempting a take off on runway 11L at bjc. Shortly after initial lift off aircraft settled back down to the runway and continued 1200 feet… 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.