# NTSB FTW97LA327: Robinson R22 Beta, N8057Z, Terrell, TX, August 24, 1997 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: August 24, 1997, 15:15 local (20:15 UTC) - Place: Terrell, TX - Coordinates: 32.729064, -96.289169 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=32.7291&lon=-96.2892&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report June 26, 1998 - Report: Approved by Office Director - NTSB case key (mKey): 20327 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW97LA327 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/20327/pdf - Page: https://openairdocs.org/ntsb/FTW97LA327 ## Probable cause the student pilot's premature flare for landing from an autorotation, and the ensuing loss of rotor rpm, which resulted in a hard landing. A factor relating to the accident was: partial loss of engine power for undetermined reason(s). ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, cruise - reason for occurrence undetermined (contributing factor) - Hard landing, emergency descent/landing - precautionary landing - initiated, pilot in command - autorotation - performed, pilot in command - flare - premature, pilot in command (cause) - rotor rpm - not maintained, pilot in command (cause) ## Analysis The student was certificated as a single-engine land airplane pilot, and was taking instruction in a Robinson R22 helicopter. According to him, while on a solo cross-country flight, the helicopter began to experience engine vibrations with a loss of engine rpms. He initiated an autorotation to an open field, and approximately 40 feet above ground level, he began the landing flare, pulling up on the collective at the same time. He stated that he noticed 'the aircraft feeling funny,' and reduced 'some' of the collective. Approximately 8 feet above ground level, the helicopter 'just dropped' to the ground. The pilot received a back injury during the accident. He had difficulty egressing from the helicopter, noting that that his right side was numb. Examination of the engine revealed no abnormalities or deficiencies. The engine was placed on a test stand and operated for 15 minutes. The engine operated normally throughout all parameters. ## Factual narrative On August 24, 1997, at 1515 central daylight time, a Robinson R-22 Beta helicopter, N8057Z, was substantially damaged after impacting terrain following a partial loss of engine power and autorotation landing to an open field 4 miles west of Terrell Municipal Airport (TRL), Terrell, Texas. The student pilot, sole occupant, received serious injuries. Visual meteorological conditions prevailed for the solo cross country flight which was conducted under Title 14 CFR Part 91. The flight originated from the Garland/DFW Heloplex Heliport (T57) in Garland, Texas, at 1400. The pilot reported to the FAA representative that the cross country flight was from Garland to the Terrell Municipal Airport, then on to Ennis Municipal Airport (F41), Ennis, Texas and returning to Garland. The pilot stated that the helicopter began experiencing engine vibrations with a loss of engine RPM and he decided to perform an autorotation. Approximately 40 feet above ground level (AGL), he initiated the landing flare pulling up on the collective at the same time. He stated that he noticed "the aircraft feeling funny" and reduced some of the collective. At about 8 feet AGL, the helicopter "just dropped" to the ground. The helicopter came to rest in the upright position. The pilot reported the following weather conditions at the time of the accident: clear skies, visibility 10 miles and winds from the south/southeast at 10 knots. According to the Pilot/Operator Aircraft Accident Report (NTSB form 6120.1/2), the pilot had accumulated a total of 638 hours, of which 89 hours were in the R-22. Examination of the helicopter at the site by the FAA inspector revealed that the rotor mast and shaft separated from the helicopter. The main rotor blades were bent upward. The tail rotor and aft 2 feet of the boom section separated from the helicopter. The right skid was bent and broken. The right fuel tank was full and the left tank was 3/4 full. On September 25, 1997, the engine was examined at Air Salvage of Dallas, Lancaster, Texas. No abnormalities or deficiencies were noted. The engine was mounted on a test stand the same day and operated for 15 minutes. The engine operated normally throughout all parameters. ## Aircraft - Registration: [N8057Z](https://openairdocs.org/deregistered/N8057Z-2013-08-08), registration cancelled 2013-08-08, S/N 2396, built 1993 (OpenAirDocs) - Reported make and model: Robinson R22 BETA - Registry model: [Robinson Helicopter R22 BETA](https://openairdocs.org/model/robinson-helicopter-r22-beta) (registry code 7640110) (OpenAirDocs) - Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs) - Category: Helicopter - Serial number: 2396 - Engines: Lycoming O-320-B2C 131 horsepower reciprocating - Damage: Substantial damage - Flight: Instructional, Part 91 - Operator: Carl W. Houser - Registered owner: Sky Helicopters Inc. - Airworthiness certificate: Standard, Normal - Departed: T57, GARLAND, TX - Destination: TRL, TERREL, TX ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 61; private; airplane ratings: single-engine land; medical: class 3, valid medical--w/ waivers/lim; seat: right; flight hours: 638 total, 89 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 100° at 10 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 84 °F ## 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 19970824046419A](https://openairdocs.org/incident/19970824046419A), Aug 24, 1997: Robsin R22BETA, Terrell, TX, No damage. (-23) Mr. Houser is adding a helicopter rating to his pvt cert. He was on a solo x-country flight, experienced power loss and performed an auto-rotation. The… 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.