# NTSB ATL05LA017: David Nielson Ison Hi-Max 1700, N105DN, Hendersonville, NC, October 30, 2004 - Type: NTSB accident investigation - Classification: Accident · Serious injuries · Limited investigation · Final report - Date: October 30, 2004, 10:45 local (14:45 UTC) - Place: Hendersonville, NC - Coordinates: 35.312778, -82.433334 - Nearby events: https://openairdocs.org/map.md?lat=35.3128&lon=-82.4333&mi=10 - Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping) - Highest injury: Serious injuries - Injuries: 1 serious - Status: Completed, report December 20, 2005 - Report: Approved by Office Director - Parties: Charlotte FSDO - NTSB case key (mKey): 60479 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL05LA017 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/60479/pdf - Page: https://openairdocs.org/ntsb/ATL05LA017 ## Probable cause The pilot's failure to maintain airspeed which resulted in an inadvertent stall/spin and subsequent in-flight collision with terrain. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of control - in flight, takeoff - initial climb - airspeed - not maintained, pilot in command (cause) - stall/spin - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled - terrain condition - ground ## Analysis According to the pilot, shortly after takeoff for the airplane's first test flight, the wind increased to approximately 25 knots. Climbout was normal, but with the increased wind, the airplane was increasingly harder to control. After turning crosswind at about 100 feet altitude, the airplane was caught in a wind shear, and he could not control the airplane. However, according to several witnesses, the airplane took off in calm winds. Witnesses stated that approximately 100 feet above ground level, the airplane banked 50 degrees left, the left wing dropped, and the airplane spun to the left about one-half turn before colliding with the ground. On-scene examination of the airplane found that it had collided with the ground in a steep nose down attitude. ## Factual narrative On October 30, 2004, at 1045 eastern daylight time, N105DN, a David Nielson Ison Hi-Max 1700 amateur-built experimental airplane, registered to a private individual, and operated by the private pilot collided with the ground shortly after takeoff from runway 14 at Air Museum Airport, Hendersonville, North Carolina. The flight was operated under the provisions of Title 14 CFR Part 91 and visual flight rules. Visual meteorological conditions prevailed and no flight plan was filed for the local test flight. The pilot received serious injuries and the airplane sustained substantial damage. The flight was originating at the time of the accident on October 30, 2004, at 1040. According to the pilot, the wind had increased to approximately 25 knots. Climb out was normal but with the increased wind, the airplane was increasingly harder to control. After turning crosswind at about 100 feet altitude, the airplane was caught in a wind shear, and he could not handle the airplane. The airplane collided with the ground in a flat plane. According to several witnesses, the airplane took off from runway 14. Witnesses stated that the winds were calm and at approximately 100 feet above ground level, the airplane banked 50 degrees left, the left wing dropped, and the airplane spun to the left about one-half turn before colliding with the ground. Witnesses stated that this was the airplane's first test flight. The nearest weather reporting facility at the time of the accident was Ashville, North Carolina. The 1054 surface weather observation was: sky clear, visibility 5-statute miles, temperature 17-degrees Celsius, dew point temperature 15-degrees Celsius, wind 0-degrees at 0 knots, and altimeter 30.05. Visual meteorological conditions prevailed at the time of the accident. Examination of the wreckage found that the airplane collided with the ground in a steep nose down attitude. The engine and cockpit were observed pointing upward and crushed aft. Both wings were bent forward and separated from their aft attachment point to the fuselage. The pilot did not report a mechanical problem with the airplane. ## Aircraft - Registration: [N105DN](https://openairdocs.org/deregistered/N105DN-2018-03-08), registration cancelled 2018-03-08, S/N MK 790, built 2004 (OpenAirDocs) - Reported make and model: David Nielson Ison Hi-Max 1700 - Registry model: [Nielsen David ISON HI-MAX 1700](https://openairdocs.org/model/nielsen-david-ison-hi-max-1700) (registry code 05617ID) (OpenAirDocs) - Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: MK790 - Airframe hours: 0 - Engines: Continental AO84-IV 60 horsepower reciprocating - Damage: Substantial damage - Flight: Flight test, Part 91 - Operator: James G. Paine - Registered owner: David Nielson - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, June 1, 2004, 0 hours before - Departed: 0A7, Hendersonville, NC - Destination: 0A7, Hendersonville, NC - Airport: 0A7, Hendersonville, runway 14, 3,075 × 40 ft, asphalt ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 70; injuries: serious; private; airplane ratings: single-engine land; medical: class 3, with waivers/limitations; last flight review May 1, 2004; seat: single; flight hours: 3,040 total, 0 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 0° at 0 knots - Visibility: 5 statute miles - Lowest ceiling: none - Temperature: 63 °F, dew point 59 °F - Altimeter: 30.04 inHg - Observed at: AVL, 20 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 20041030029949A](https://openairdocs.org/incident/20041030029949A), Oct 30, 2004: Amtr 1700RHIMAX, Hendersonville, NC, Destroyed. (-23) This homebuilt aircraft (N105DN) took off from runway 8NC9, heading in a southerly direction. After lift off the pilot banked to the left to avoid trees… 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.