# NTSB ATL95LA129: Bensen B-8M, N70216, Siler City, NC, July 5, 1995 - Type: NTSB accident investigation - Classification: Accident · Fatal · Limited investigation · Final report - Date: July 5, 1995, 10:18 local (14:18 UTC) - Place: Siler City, NC - Coordinates: 35.720104, -79.459808 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=35.7201&lon=-79.4598&mi=10 - Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed, report February 27, 1996 - Report: Approved by Office Director - NTSB case key (mKey): 3589 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL95LA129 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/3589/pdf - Page: https://openairdocs.org/ntsb/ATL95LA129 ## Probable cause THE PILOT'S FAILURE TO MAINTAIN CONTROL OF THE GYROCOPTER WHICH RESULTED IN AN INFLIGHT BREAKUP. A FACTOR WAS THE PILOT'S LACK OF A ROTORCRAFT OR GYROCOPTER CERTIFICATION. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, climb - flight controls - improper use of, pilot in command (cause) - lack of certification, pilot in command (contributing factor) - Airframe/component/system failure/malfunction, descent - uncontrolled - In flight collision with terrain/water, descent - uncontrolled ## Analysis THE PILOT TAXIED TO RUNWAY 04 AND STARTED HIS TAKEOFF. ACCORDING TO WITNESSES, THE GYROCOPTER USED ABOUT 2500 FEET OF THE RUNWAY FOR THE TAKEOFF. THEY REPORTED THAT THE GYROCOPTER BOUNCED ON THE RUNWAY SEVERAL TIMES BEFORE BECOMING AIRBORNE. AS THE GYROCOPTER MADE A RIGHT CLIMBING TURN, ONE WITNESS SAW PIECES OF THE GYROCOPTER FALLING FROM THE AIR. THE AIRCRAFT IMPACTED THE GROUND 1/4 MILE SOUTH OF THE AIRPORT. EXAMINATION OF THE AIRCRAFT DISCLOSED EVIDENCE OF MAIN ROTOR BLADE CONING, AND MAIN ROTOR CONTACT WITH THE RUDDER CONTROL SURFACE. EXAMINATION OF THE AIRCRAFT FAILED TO DISCLOSE A MECHANICAL MALFUNCTION. A REVIEW OF WEATHER DATA REVEALED THAT CONDITIONS WERE FAVORABLE FOR THE FORMATION OF CARBURETOR ICE. AN EXAMINATION OF THE PILOT'S QUALIFICATIONS INDICATED THAT THE HE WAS NOT ROTORCRAFT OR GYROCOPTER RATED. ## Factual narrative On July 5, 1995, at 1018 eastern daylight time, Bensen Gyrocopter, B-8M, N70216, broke up in flight shortly after takeoff from a private airstrip near Siler City, North Carolina. The personal flight operated under the provisions of 14 CFR Part 91 with no flight plan filed. Visual weather conditions prevailed at the time of the accident. The aircraft was destroyed, and the pilot received fatal injuries. The accident occurred during the initial takeoff attempt from Siler City. The pilot taxied to runway 04 for a takeoff. According to witnesses, the takeoff attempt used about 2500 feet of the runway surface. The aircraft bounced several times on the runway surface before becoming airborne. After liftoff, the aircraft climbed to 200 feet and the pilot made a right climbing turn. As the aircraft reached the midway point of the runway on the downwind leg of the traffic pattern, witnesses observed the aircraft start a series of pitching oscillations, which culminated in the aircraft flipping inverted. One witness observed the aircraft as it came apart in flight, and fell to the ground. Examination of the aircraft wreckage and accident site disclosed that wreckage debris was scattered over an area 900 feet long. Examination of the wreckage revealed main rotor and rudder control surface contact in flight. Further examination of the main rotor system disclosed that both rotor blades were deformed upward. The flight control examination also failed to disclose a mechanical problem. The propeller wood propeller blades were broken at both tips. An examination of the engine assembly failed to disclose a mechanical problem. The magneto assembly produced an ignition spark during the functional check. A review of the pilot's qualifications indicated that he was not helicopter nor gyrocopter rated. The review of the pilot's flight log indicated that he had received several hours of dual helicopter instruction, but there was no record of a helicopter nor gyrocopter pilot flight check. The postmortem examination of the pilot was conducted by Dr. Robert L. Thompson on July 6, 1995 at the Office of the Chief Medical Examiner in Chapel Hill, North Carolina. The toxicological examination was negative for alcohol, and drugs. ## Aircraft - Registration: [N70216](https://openairdocs.org/deregistered/N70216-1997-05-21), registration cancelled 1997-05-21, S/N 880730 (OpenAirDocs) - Reported make and model: BENSEN B-8M - Registry model: [Fowler Roger G BENSEN B8M](https://openairdocs.org/model/fowler-roger-g-bensen-b8m) (registry code 13021ZC) (OpenAirDocs) - Category: Gyroplane, amateur-built - Serial number: 880730 - Airframe hours: 24 - Engines: McCulloch 43181A reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: John R. Zimmerman - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, March 26, 1994, 8 hours before - Airport: 5W8, Blair Field, runway 4, 5,000 × 75 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 26; private; airplane ratings: single-engine land; instrument ratings: airplane; medical: class 3, valid medical--w/ waivers/lim; seat: center; toxicology performed; flight hours: 220 total, 9 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: calm - Visibility: 5 statute miles - Lowest ceiling: 16,000 ft overcast - Temperature: 82 °F, dew point 72 °F - Altimeter: 30.00 inHg - Observed at: GSO, 30 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 19950705019869A](https://openairdocs.org/incident/19950705019869A), Jul 5, 1995: Amtr B8M, Siler City, NC, Destroyed, 1 fatal. Over controlled on climbout causing oscillations and rotors to strike rudder. Broke up in flight. Not gyro endorsed 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.