# NTSB DEN05LA089: Bell 206L-3, N81EA, Cascade, CO, June 12, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: June 12, 2005, 16:35 local (22:35 UTC) - Place: Cascade, CO - Coordinates: 37.584999, -107.691947 - Nearby events: https://openairdocs.org/map.md?lat=37.5850&lon=-107.6919&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 4 uninjured - Status: Completed, report January 31, 2006 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 61696 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=DEN05LA089 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/61696/pdf - Page: https://openairdocs.org/ntsb/DEN05LA089 ## Probable cause The pilot's failure to maintain aircraft control during the attempted landing on mountainous terrain. A contributing factor was strong wind gusts during the attempted landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, landing - aircraft control - not maintained, pilot in command (cause) - weather condition - gusts (contributing factor) - In flight collision with terrain/water, descent - uncontrolled - terrain condition - mountainous/hilly - terrain condition - snow covered - Roll over, landing ## Analysis While attempting to land, the pilot failed to maintain aircraft control, and the helicopter impacted terrain. The pilot made three attempts to land at the intended landing zone (LZ). The first attempt to an LZ yielded too great of a slope on the terrain. The second attempt was much closer to the intended area; however, the terrain was unstable. On the third attempt, just slightly above effective translation lift (ETL), at 11,900 feet msl, the pilot executed a left orbit and located a level landing site. As he approached, he noticed some "trees were laying over" in a "very strong gust" of wind, and ETL was lost. The pilot attempted a pedal turn into the wind. The helicopter resisted an immediately turn, then it "took off to the left." The pilot applied right pedal to arrest the turn. The pilot reduced power, neutralized the pedals, and applied forward cyclic. The rate of turn accelerated and pinned the pilot back into the seat. Subsequently, the right skid and tail boom struck the terrain and the helicopter rolled over. Examination of the helicopter revealed no anomalies. ## Factual narrative On June 12, 2005, approximately 1635 mountain daylight time, a Bell 206L-3 single-engine helicopter, N81EA, sustained substantial damage when it impacted the terrain following a loss of control while maneuvering near Cascade, Colorado. The commercial pilot and three passengers were not injured. The helicopter was owned and operated by New Air Helicopters, Bend, Oregon. Visual meteorological conditions prevailed, and a flight plan was not filed for the Title 14 Code of Federal Regulations Part 91 business flight. The flight originated Tall Timbers Resort, near Durango, Colorado, at 1400. According to the pilot's statement, the pilot and three passengers were investigating the status of the resort's trails and to locate and move a repeater (a device that enhances wireless signals and allows communication over a greater distance) that had been placed the day before. According to the pilot, showers and low clouds prevented flying directly to the area. The pilot made three attempts to land at the landing zone (LZ). The first attempt yielded too great of a slope and a large distance from the repeater. The second attempt was much closer and on the same knoll as the repeater, but was unstable. On the third attempt, just slightly above effective translation lift (ETL), at 11,900 feet msl, the pilot executed a left orbit and located a level LZ. As the helicopter approached the LZ, the pilot noticed some "trees were laying over" in a "very strong gust" of wind, and ETL was lost. The pilot attempted a pedal turn into the wind; however, the helicopter resisted an immediate turn, then it "took off to the left." The pilot applied right pedal to arrest the turn. The pilot reduced power, neutralized the pedals, and applied forward cyclic. The rate of turn accelerated and pinned the pilot back into the seat. Subsequently, the right skid and tail boom struck terrain, and the helicopter rolled over. The pilot noted light rain and partially restricted visibility from fog. He estimated that the winds were out of the northeast at 10 knots gusting to 20 knots. Examination of the helicopter by the operator revealed no anomalies. ## Aircraft - Registration: N81EA (not matched to a registry record) - Reported make and model: Bell 206L-3 - Category: Helicopter - Serial number: 51094 - Airframe hours: 5989.7 - Engines: Allison C-30P 650 horsepower turbo shaft - Damage: Substantial damage - Flight: Positioning, Part 91 - Operator: New Air Helicopters, doing business as Icza674b - Registered owner: New Air - Airworthiness certificate: Standard, Normal - Last inspection: Annual, May 1, 2005, 15.4 hours before - Departed: 00C, Durango, CO - Airport: 00C, Durango ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: none; commercial; instrument ratings: helicopter; medical: class 2, with waivers/limitations; last flight review April 1, 2005; seat: front; flight hours: 3,698 total, 370 in this make and model, 3,498 as pilot in command, 38 in the last 90 days, 14 in the last 30 days, 1 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 290° at 10 knots, gusting 20 - Visibility: 5 statute miles - Temperature: 37 °F, dew point 30 °F - Altimeter: 30.07 inHg ## 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 20050612011999A](https://openairdocs.org/incident/20050612011999A), Jun 12, 2005: Bell 206L3, Durango, CO, Substantial damage. (-23) Pilot's statement: I departed tall timbers with three passengers (about 400 pounds and 310 pounds of fuel) to locate and move a repeater they had placed… 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.