# NTSB FTW98LA235: Bell 206BIII, N206TA, Hurst, TX, May 21, 1998 - Type: NTSB accident investigation - Classification: Accident · No injuries · Limited investigation · Final report - Date: May 21, 1998, 15:18 local (20:18 UTC) - Place: Hurst, TX - Coordinates: 32.829761, -97.169509 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=32.8298&lon=-97.1695&mi=10 - Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping) - Highest injury: No injuries - Injuries: 2 uninjured - Status: Completed, report December 1, 1999 - Report: Approved by Office Director - NTSB case key (mKey): 20620 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW98LA235 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/20620/pdf - Page: https://openairdocs.org/ntsb/FTW98LA235 ## Probable cause The pilot's delayed recovery from a simulated autorotative landing. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Hard landing, landing - flare/touchdown - autorotation - simulated, pilot in command(cfi) - remedial action - delayed, pilot in command(cfi) ## Analysis During an autorotation, the helicopter landed hard. The flight instructor was demonstrating an autorotation with a 180 degree turn to Lane 4, at the Bell Helicopter Hurst Heliport. At approximately 100 feet AGL, the flight instructor determined a power recovery was necessary, and at about 50 to 70 feet he increased the throttle to full on; however, the engine did not respond. As the autorotation continued, the instructor 'continued to try and get the throttle and engine to respond.' The helicopter touched down on the end of Lane 4, bounced and veered off of the lane 45 degrees to the right. The helicopter then touched down in the grass bouncing two more times before coming to a stop upright about 70 feet from the end of the lane. The instructor reported that as the aircraft bounced and ran through the grass he 'felt [the] engine begin to spool and [he] closed the throttle to idle.' The aircraft's engine was inspected and returned to service. ## Factual narrative On May 21, 1998, at 1518 central daylight time, a Bell 206BIII helicopter, N206TA, owned and operated by Bell Helicopter Textron, was substantially damaged during a hard landing near Hurst, Texas. Visual meteorological conditions prevailed, and a company flight plan was filed for the Title 14 CFR Part 91 instructional flight. The flight instructor and the commercial pilot receiving instruction were not injured. The flight instructor reported that he was demonstrating an autorotation with a 180 degree turn to Lane 4, at the Bell Helicopter Hurst Heliport. At approximately 100 feet AGL, the flight instructor determined a power recovery was necessary due to low rotor RPM and a high rate of descent. At about 50 to 70 feet the flight instructor increased the throttle to full on; however, the engine did not respond, and the autorotation was continued. The instructor reported that prior to touchdown, he verified that the throttle was full on. The helicopter touched down on the departure end of Lane 4, bounced and veered off of the lane 45 degrees to the right. The helicopter then touched down in the grass bouncing two more times before coming to a stop upright about 70 feet from the end of the lane. The instructor also reported that as the aircraft bounced and ran through the grass he "felt [the] engine begin to spool and [he] closed the throttle to idle." The 3,200 hour pilot receiving instruction reported that as the helicopter "rolled out of the turn," at 100 feet, the flight instructor elected to initiate a power recovery and execute a go-around. At approximately 50 to 70 feet the instructor attempted to "add throttle," but the engine did not respond. The instructor "continued to try and get the throttle and engine to respond," then he "leveled the aircraft and we hit the runway straight ahead." Examination of the helicopter revealed that the aft structural panel on the right side of the fuselage was wrinkled. The spike plate under the main transmission was damaged, the main drive shaft contacted the isolation mount, and one main rotor blade struck the tail rotor drive shaft cover. The aircraft's engine was inspected and returned to service. ## Aircraft - Registration: [N206TA](https://openairdocs.org/aircraft/N206TA), registered now, S/N 3319, built 1981 (OpenAirDocs) - Reported make and model: Bell 206BIII - Registry model: [Bell 206B](https://openairdocs.org/model/bell-206b) (registry code 1181511) (OpenAirDocs) - Registry engine: [Allison 250-C20 series](https://openairdocs.org/engine/allison-250-c20-series) (registry code 03020, turbo-prop) (OpenAirDocs) - Category: Helicopter - Serial number: 4463 - Airframe hours: 536 - Engines: Allison 250-C20 420 horsepower turbo shaft - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Bell Helicopter Textron - Registered owner: Textron Financial Corporation - Airworthiness certificate: Standard, Normal - Last inspection: Annual, April 21, 1998, 65 hours before - Departed: 2F2 - Flight plan: Company VFR - Airport: 2F2, Bht2 Training Strip, runway 18, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 37; airline transport, commercial; airplane ratings: multi-engine land; instrument ratings: airplane, helicopter; medical: class 1, valid medical--no waivers/lim.; seat: left; flight hours: 5,500 total ## Weather - Conditions: Visual (VMC), Day - Wind: 170° at 14 knots - Visibility: 9 statute miles - Lowest ceiling: none - Temperature: 91 °F, dew point 70 °F - Altimeter: 29.00 inHg - Observed at: DFW, 270 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 19980521043869A](https://openairdocs.org/incident/19980521043869A), May 21, 1998: Bell 206B3, Hurst, TX, Substantial damage. (.4)During an autorotation, the helicopter landed hard. The flight instruc tor was demonstrating an autorotation with a 180 degree turn to lane 4, at the Bell… 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.