# NTSB CHI02LA037: Vermeys T-Bird II, N3KV, Sherburn, MN, November 10, 2001 - Type: NTSB accident investigation - Classification: Accident · Fatal · Limited investigation · Final report - Date: November 10, 2001, 16:22 local (22:22 UTC) - Place: Sherburn, MN - Coordinates: 43.650753, -94.720123 (estimated) - Nearby events: https://openairdocs.org/map.md?lat=43.6508&lon=-94.7201&mi=10 - Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed, report April 18, 2003 - Report: Approved by Office Director - Parties: Federal Aviation Administration - NTSB case key (mKey): 53831 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI02LA037 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/53831/pdf - NTSB docket: https://data.ntsb.gov/Docket?ProjectID=53831 - Page: https://openairdocs.org/ntsb/CHI02LA037 ## Probable cause The loss of engine power for undetermined reasons, and the pilot's failure to maintain airspeed which resulted in an inadvertent stall/spin. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, maneuvering - reason for occurrence undetermined (cause) - Loss of control - in flight, maneuvering - airspeed - not maintained, pilot in command (cause) - stall - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled ## Analysis The amateur-built experimental airplane was destroyed on impact with terrain during an uncontrolled descent. The pilot was fatally injured. The Sheriff's report stated, "It had started to fall from approximately 500 feet. I was advised that it appeared that the engine had stalled and that the aircraft began to spiral before hitting the ground. The first witness on the scene advised that the engine had been running when he arrived. The parachute on the aircraft had been deployed. It appeared that the aircraft had hit the ground nose first." A witness stated that he watched the airplane fly around for about a half hour. He said the airplane was climbing and descending like a crop duster. He said that he heard the engine shut down. He said that he saw the airplane almost stand there, hung for a second or two, and nosed down. The airplane corkscrewed to the left about three quarters of a turn. He said the airplane did not go directly down and did not glide out of the descent. When the airplane descended below a hill he heard two pops like a shotgun. The accident was reported to the local Automated Flight Service Station as an ultralight accident. Photographs of the accident site showed level terrain available for a forced landing. ## Factual narrative HISTORY OF FLIGHT On November 10, 2001, about 1622 central standard time, an experimental amateur-built Vermeys T-Bird II, N3KV, piloted by a private pilot, was destroyed on impact with terrain during an uncontrolled descent near Sherburn, Minnesota. The personal flight was operating under 14 CFR Part 91. Visual meteorological conditions prevailed at the time of the accident. No flight plan was on file. The pilot was fatally injured. The local flight originated from a private airstrip near Sherburn, Minnesota, at time unknown. The Martin County Sheriff's report stated: ... Witnesses that were hunting in the area advised they saw the aircraft go down. It had started to fall from approximately 500 feet. I was advised that it appeared that the engine had stalled and that the aircraft began to spiral before hitting the ground. The first witness on the scene advised that the engine had been running when he arrived. The parachute on the aircraft had been deployed. It appeared that the aircraft had hit the ground nose first. The front tire was bent at its supports. Some of the frame from the front was imbedded in the ground. The rest of the aircraft had landed approximately 10 feet behind where the part of the frame had been imbedded in the ground. During a telephone interview a witness stated that he watched the airplane fly around for about a half hour. He said the airplane was climbing and descending like a crop duster. He said that he heard the engine shut down. He said that he saw the airplane almost stand there, hung for a second or two, and nosed down. The airplane corkscrewed to the left about three quarters of a turn. He said the airplane did not go directly down and did not glide out of the descent. When the airplane descended below a hill he heard two pops like a shotgun. PERSONNEL INFORMATION The pilot held a private pilot certificate with a single-engine land airplane rating. According to Federal Aviation Administration (FAA) records, his most recent FAA third-class medical certificate was issued on February 2, 2000, with no restrictions listed. The pilot noted he had 120 hours of total flight time at the time of that medical certificate. AIRCRAFT INFORMATION The airplane was a single engine experimental amateur-built Vermeys T-Bird II, N3KV, serial number 001KV. The kit manufacturer's specifications stated that the airplane seated two and had a maximum gross weight of 1,000 pounds. Photographs revealed its engine was a Rotax 582 engine. The kit manufacturer stated: [The pilot] bought a T-Bird from somewhere. It was wrecked when a building caved in on it. He wanted to buy parts to fix it and ended up buying most of an airframe. ... He used some parts from the wreck and some from the parts we sent him. Records showed the plane was equipped with a Ballistic Recovery System, Inc. (BRS) Vertical Launch System (VLS) parachute. The pilot noted that it was a "BRS - 5 VLS Model 1200 SN 12698." (See appended specifications) METEOROLOGICAL INFORMATION At 1615, the Jackson Municipal Airport, near Jackson, Minnesota, weather was: Wind 360 degrees at 7 knots; visibility 10 statute miles; sky condition clear; temperature 11 degrees C; dew point -3 degrees C; altimeter 30.24 inches of mercury. WRECKAGE AND IMPACT INFORMATION The Martin County Sheriff's report stated that the airplane came to rest in "Section 28 Jay Township (300 Block of 80th street)." Pictures of the site revealed that the BRS parachute was deployed and it came to rest on the ground. (See appended photographs) The photographs showed that the airplane impacted the ground with its nose approximately 80 degrees nose down. MEDICAL AND PATHOLOGICAL INFORMATION The Olmsted County Coroner's Office performed an autopsy on the pilot November 11, 2001. No toxicological samples were taken. ADDITIONAL INFORMATION Photographs of the accident site showed level terrain for a forced landing. A FAA employee representing the Air Traffic Manager for Princeton Automated Flight Service Station (AFSS) stated: This memo is to confirm that Princeton AFSS Watch Supervisor did receive a call on November 10, 2001 from a law enforcement official reporting an aircraft accident. The official stated that the aircraft was an ultralight and that he wasn't sure if ultralights were regulated. The Watch Supervisor told the official that ultralight accidents are not reportable accidents. No further action was taken by the Princeton AFSS. During the conversation the reporting official did not say that the aircraft had an N-number. The FAA was a party to the investigation. ## Aircraft - Registration: [N3KV](https://openairdocs.org/deregistered/N3KV-2004-03-29), registration cancelled 2004-03-29, S/N 001KV, built 1997 (OpenAirDocs) - Reported make and model: Vermeys T-Bird II - Registry model: [Vermeys Kenneth R T-BIRD II](https://openairdocs.org/model/vermeys-kenneth-r-t-bird-ii) (registry code 0560429) (OpenAirDocs) - Registry engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 001KV - Engines: Rotax 582 64 horsepower reciprocating - Damage: Destroyed - Flight: Personal, Part 91 - Registered owner: David G. Roben - Airworthiness certificate: Special, Experimental (Special) - Departed: Sherburn, MN ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 44; injuries: fatal; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; flight hours: 120 total ## Weather - Conditions: Visual (VMC), Day - Wind: 360° at 7 knots - Visibility: 10 statute miles - Lowest ceiling: none - Temperature: 52 °F, dew point 27 °F - Altimeter: 30.23 inHg - Observed at: MJQ, 10 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 20011110030939A](https://openairdocs.org/incident/20011110030939A), Nov 10, 2001: Amtr TBIRD, Sherburn, NM, No damage, 1 fatal. (-23) Witnesses stated aircraft spiraled into the ground. (.19) on November 10, 2001, about 1622 central standard time, a vermeys t-bird ii, N3KV, piloted by a… ## Docket (14 files) The files NTSB released with the investigation on January 6, 2003, on NTSB's docket system: https://data.ntsb.gov/Docket?ProjectID=53831. 1.0 MB in all. - Record of Interview (item 1, .PDF, 69 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40408821&FileExtension=.PDF&FileName=Record%20of%20Interview-Redacted.PDF - Map of Accident Area (item 2, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174268&FileExtension=.PDF&FileName=Map%20of%20Accident%20Area-Master.PDF - Martin County Sheriff's Report (item 3, .PDF, 176 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40408820&FileExtension=.PDF&FileName=Martin%20County%20Sheriff%27s%20Report-Redacted.PDF - Ballistic Recovery Systems, Inc. Documents (item 4, .PDF, 218 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174270&FileExtension=.PDF&FileName=Ballistic%20Recovery%20Systems,%20Inc.%20Documents-Master.PDF - Kit Manufacturer's Documents (item 5, .PDF, 170 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174271&FileExtension=.PDF&FileName=Kit%20Manufacturer%27s%20Documents-Master.PDF - T-Bird II Specifications (item 6, .PDF, 64 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174272&FileExtension=.PDF&FileName=T-Bird%20II%20Specifications-Master.PDF - Photo 1. Accident Site (item 7, .PDF, 29 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174273&FileExtension=.PDF&FileName=Photo%201.%20%20Accident%20Site-Master.PDF - Photo 2. View of the Airplane and Parachute (item 8, .PDF, 34 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174274&FileExtension=.PDF&FileName=Photo%202.%20%20View%20of%20the%20Airplane%20and%20Parachute-Master.PDF - Photo 3. View of the Fuselage (item 9, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174275&FileExtension=.PDF&FileName=Photo%203.%20%20View%20of%20the%20Fuselage-Master.PDF - Photo 4. View of the Right Wing (item 10, .PDF, 31 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174276&FileExtension=.PDF&FileName=Photo%204.%20%20View%20of%20the%20Right%20Wing-Master.PDF - Photo 5. View of the Wings and Empennage (item 11, .PDF, 32 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174277&FileExtension=.PDF&FileName=Photo%205.%20%20View%20of%20the%20Wings%20and%20Empennage-Master.PDF - Photo 6. View of the Engine and Propeller (item 12, .PDF, 45 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174278&FileExtension=.PDF&FileName=Photo%206.%20%20View%20of%20the%20Engine%20and%20Propeller-Master.PDF - Photo 7. View of the Instrument Panel (item 13, .PDF, 44 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174279&FileExtension=.PDF&FileName=Photo%207.%20%20View%20of%20the%20Instrument%20Panel-Master.PDF - Photo 8. View of the Engine (item 14, .PDF, 41 KB): https://data.ntsb.gov/Docket/Document/docBLOB?ID=40174280&FileExtension=.PDF&FileName=Photo%208.%20%20View%20of%20the%20Engine-Master.PDF 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.