# NTSB NYC05LA145: Eurocopter Deutschland BK-117-B2, N117MK, Columbus, OH, September 22, 2005 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 22, 2005, 14:00 local (18:00 UTC) - Place: Columbus, OH - Coordinates: 40.079723, -83.072776 - Nearby events: https://openairdocs.org/map.md?lat=40.0797&lon=-83.0728&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 5 uninjured - Status: Completed, report April 25, 2007 - Report: Approved by Office Director - Parties: FAA Columbus FSDO - NTSB case key (mKey): 62554 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=NYC05LA145 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/62554/pdf - Page: https://openairdocs.org/ntsb/NYC05LA145 ## Probable cause The pilot's failure to maintain aircraft control during the landing flare, which resulted in a hard landing. A factor associated with this accident was a tailwind. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - weather condition - tailwind (contributing factor) - aircraft control - not maintained, pilot in command (cause) - terrain condition - ground ## Analysis The pilot reported he was returning to land from a local flight when he noticed another helicopter hovering on the ramp, and elected to alter his approach away from the other helicopter, with the intent of landing southwest of the ramp. He flew parallel to runways 27 left and right, leveled off at 50 feet, and began a right turn to approach the ramp from the west. The pilot added that he observed a kneeboard fall from the co-pilot's side of the helicopter, and land near the cyclic control boot. He tried to straighten the helicopter; however, the cyclic control felt "stiff," and could only be moved slightly to the left or aft. The helicopter continued to descend, and landed hard. A helicopter pilot, who witnessed the accident, stated that the helicopter's approach was fast, steep, and conducted with a tailwind. Examination of the helicopter, and its associated hydraulic control system, did not reveal any preimpact malfunctions. In addition, attempts to restrict the cyclic control movement by positioning the kneeboard at various locations around the cyclic control could not be duplicated. A weather observation taken at the airport, about the time of the accident, reported winds from 190 degrees at 12 knots. The pilot reported that at the time of the accident, the wind sock was "limp." ## Factual narrative On September 22, 2005, about 1400 eastern daylight time, a Eurocopter Deutschland BK-117-B2 helicopter, N117MK, was substantially damaged during a hard landing at Ohio State University Airport (OSU), Columbus, Ohio. The certificated airline transport pilot and four passengers were not injured. Visual meteorological conditions prevailed and no flight plan had been filed for the local business flight conducted under 14 CFR Part 91. The pilot reported he had flown around the Columbus area on a public relations flight, and was returning to OSU. He noticed another helicopter running up on the ramp, and elected to alter his approach with the intent of landing southwest of the ramp, to avoid any "rotor wash." The pilot flew parallel to runways 27 left and right, leveled off at 50 feet, and began a right turn to approach the ramp from the west. The pilot added that he observed a kneeboard fall from the co-pilot's side of the helicopter, and land near the cyclic control boot. He tried to straighten the helicopter; however, the cyclic control felt "stiff," and could only be moved slightly to the left or aft. The helicopter continued to descend, and landed hard. On the NTSB pilot/operator accident report form, the pilot also indicated that the helicopter may have experienced a control malfunction or hydraulic failure. A helicopter pilot, who witnessed the accident, stated that the helicopter's approach was fast, steep, and conducted with a tailwind. The helicopter started to flare about 100 feet above the ground, and entered a "hard right turn" just prior to the main rotor blades and the right skid contacting the ground. Examination of the helicopter, and its associated hydraulic control system by Federal Aviation Administration inspectors did not reveal any pre-impact malfunctions. In addition, attempts to restrict the cyclic control movement by positioning the kneeboard at various locations around the cyclic control could not be duplicated. The helicopter was maintained under an approved inspection program, and had been operated for about 30 hours, since its most recent inspection. The pilot reported 3,400 hours of total rotorcraft flight experience, which included about 2,300 hours in the same make and model as the accident helicopter. Winds reported at OSU, at 1353, were from 190 degrees at 12 knots. The pilot reported that at the time of the accident, the wind sock was "limp." ## Aircraft - Registration: [N117MK](https://openairdocs.org/aircraft/N117MK), registered now, S/N 7196, built 1989 (OpenAirDocs) - Reported make and model: Eurocopter Deutschland BK-117-B2 - Registry model: [Eurocopter Deutschland MBB-BK 117-B2](https://openairdocs.org/model/eurocopter-deutschland-mbb-bk-117-b2) (registry code 5626027) (OpenAirDocs) - Registry engine: [Lycoming LTS-101 series](https://openairdocs.org/engine/lycoming-lts-101-series) (registry code 41560, turbo-shaft) (OpenAirDocs) - Category: Helicopter - Serial number: 7196 - Airframe hours: 7871 - Engines: Lycoming LTS-101 750 horsepower turbo shaft; Lycoming LTS-101 750 horsepower turbo shaft - Damage: Substantial damage - Flight: Business, Part 91 - Operator: Omniflight Helicopters - Registered owner: Chase Equipment Leasing - Airworthiness certificate: Standard, Transport - Last inspection: AAIP, September 1, 2005, 29 hours before - Departed: OSU, Columbus, OH - Destination: OSU, Columbus, OH - Airport: OSU, Ohio State ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 35; injuries: none; flight instructor, airline transport; instrument ratings: helicopter; medical: class 2, without waivers/limitations; last flight review August 1, 2005; seat: right; flight hours: 3,400 total, 2,286 in this make and model, 2,891 as pilot in command, 63 in the last 90 days, 18 in the last 30 days, 0 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 190° at 12 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 86 °F, dew point 63 °F - Altimeter: 29.94 inHg - Observed at: OSU ## 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 20050922025939A](https://openairdocs.org/incident/20050922025939A), Sep 22, 2005: Bolkms BK117B2, Columbus, OH, Substantial damage. (-23) The helicopter made a hard landing. A witness reported "I noticed a med flight helicopter approaching the airport from the southeast. The bk 117 started… 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.