# NTSB MIA01LA231: Bell OH-58A, N923MC, Sevierville, TN, September 27, 2001 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: September 27, 2001, 17:20 local (21:20 UTC) - Place: Sevierville, TN - Coordinates: 35.761112, -83.674446 - Nearby events: https://openairdocs.org/map.md?lat=35.7611&lon=-83.6744&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report June 3, 2002 - Report: Approved by Office Director - Parties: FAA FSDO, Bell Helicopter - NTSB case key (mKey): 53541 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA01LA231 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53541/pdf - Page: https://openairdocs.org/ntsb/MIA01LA231 ## Probable cause The failure of the pilot to maintain control of the helicopter while approach to land resulting in a hard landing, a tail rotor ground strike, and the main rotor striking the tail boom. ## 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) - Hard landing, descent - uncontrolled ## Analysis The pilot stated that as he approached his landing zone, while about 3 feet agl, the helicopter veered to the left. He corrected using right cyclic and by lowering the collective. The helicopter touched down hard causing a tailrotor strike and the main rotor to strike the tail boom. Postcrash examination of the helicopter at the crash site by an FAA Inspector, and after recovery from the crash site by an FAA Inspector and a representative of Bell Helicopter confirmed that continuity of flight control components existed at the time of impact, and that there was freedom of movement throughout the flight control systems after recovery. The examination confirmed that there was a high rate of rotation of the drive train components at the time of impact. There were no preimpact airframe anomalies identified. ## Factual narrative On September 27, 2001, about 1720 eastern daylight time, a Bell OH-58A, N923MC, registered to Vista-Dome Simulation Corporation, crashed during landing near Sevierville, Tennessee, while on a 14 CFR 91 aerial filming flight. Visual meteorological conditions prevailed at the time and no flight plan was filed. The helicopter received substantial damage and the commercial-rated pilot and one passenger were not injured. The flight originated from Sevierville, Tennessee, the same day, about 1645. The pilot stated that he was flying the helicopter from the right front seat and his passenger was in the left front seat. As he approached his landing zone, while about 3 feet agl, the helicopter veered to the left. He corrected using right cyclic and by lowering the collective. The helicopter touched down hard causing a tailrotor strike and the main rotor to strike the tail boom. Postcrash examination of the helicopter at the crash site by an FAA Inspector, and after recovery from the crash site by an FAA Inspector and a representative of Bell Helicopter confirmed that continuity of flight control components existed at the time of impact, and that there was freedom of movement throughout the flight control systems after recovery. The examination confirmed that there was a high rate of rotation of the drive train components at the time of impact. There were no preimpact airframe anomalies identified. Cyclic controls were installed in both the left and right front seat positions. (See Bell Helicopter report, an attachment to this report) ## Aircraft - Registration: N923MC (not matched to a registry record) - Reported make and model: Bell OH-58A - Category: Helicopter - Serial number: 7015637 - Airframe hours: 7530 - Engines: Allison T63-A-720A 420 horsepower turbo shaft - Damage: Substantial damage - Flight: Other work use, Part 91 - Registered owner: Vista Dome Simulation Corporation - Airworthiness certificate: Special, Restricted (Special) - Last inspection: Annual, September 1, 2001, 3 hours before - Departed: Sevierville, TN ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 63; injuries: none; private, commercial; airplane ratings: single-engine land; medical: class 2, valid medical--w/ waivers/lim; last flight review September 24, 2000; seat: right; flight hours: 831 total, 193 in this make and model, 788 as pilot in command, 30 in the last 90 days, 12 in the last 30 days, 3 in the last 24 hours ## Weather - Conditions: Visual (VMC), Day - Wind: 280° at 6 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 72 °F, dew point 45 °F - Altimeter: 30.01 inHg - Observed at: TYS, 25 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 20010927027379A](https://openairdocs.org/incident/20010927027379A), Sep 27, 2001: Bell OH58A, Sevierville, TN, Substantial damage. (.19) On September 27, 2001, about 1830 eastern daylight time, a Bell OH-58A, N923MC, registered to vista-dome simulation corporation, crashed during landing… 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.