# NTSB ATL04LA111: Riggs Skyraider 1, N321TR, Blounts Creek, NC, May 6, 2004 - Type: NTSB accident investigation - Classification: Accident · Fatal · Limited investigation · Final report - Date: May 6, 2004, 18:33 local (22:33 UTC) - Place: Blounts Creek, NC - Coordinates: 35.461112, -77.000831 - Nearby events: https://openairdocs.org/map.md?lat=35.4611&lon=-77.0008&mi=10 - Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping) - Highest injury: Fatal - Injuries: 1 fatal - Status: Completed, report September 29, 2004 - Report: Approved by Office Director - Parties: Greensboro FSDO - NTSB case key (mKey): 59193 - NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ATL04LA111 - NTSB report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/59193/pdf - Page: https://openairdocs.org/ntsb/ATL04LA111 ## Probable cause The pilot's failure to maintain adequate airspeed which resulted in a stall. A factor was loss of engine power and water in the fuel. ## Sequence of events In NTSB's coding before 2008 (https://www.ntsb.gov/GILS/Documents/codman.pdf). - Loss of engine power, approach - vfr pattern - base leg/base to final - aircraft preflight - inadequate, pilot in command (contributing factor) - fluid,fuel - contamination,water (contributing factor) - Forced landing, descent - emergency - Loss of control - in flight, descent - emergency - airspeed - not maintained, pilot in command (cause) - stall - inadvertent, pilot in command - In flight collision with terrain/water, descent - uncontrolled - terrain condition - grass ## Analysis The circumstances of the flight and if a complete preflight or fuel system check was performed by the pilot are not known. A witness stated that the airplane was on a base to final for the grass strip runway when the left wing dipped and the airplane went straight into the ground. The airplane came to rest in a field with a nose down attitude, 100 yards northwest of the runway. Based on the global positioning system (GPS) track recovered from the airplane, the flight duration was one minute and twenty seconds. Examination of the wreckage site found the airplane in the immediate area, approximately 35 degrees in a nose down attitude. The engine was buried several inches into the ground and displaced aft into the cockpit area. Examination of the airplane revealed the fuselage was buckled, the empennage was deflected towards the right side, both wings had leading edge crush damage, the left wing ribs were broken and the right main wheel was separated. The examination also revealed that there was six pounds of lead weight added to the tail section at the bottom of the horizontal stabilizer and there were no problems found with the flight controls. Further examination discovered that there was a small amount of corrosion from water inside the bowl of the carburetor that was found separated from the engine and the bowl from the other carburetor contained fuel and water. The two-inline fuel filters both contained water. The only fuel drain in the aircraft was connected to the bottom of the header tank. The drain was removed and four ounces of water was discovered in the header tank. The left wing tank had no facilities for a drain in the tank and 10 to 12 ounces of water was found in that tank. The right fuel tank had been separated and was empty. ## Factual narrative On May 6, 2004, at 1833 eastern daylight time, a Riggs Skyraider homebuilt experimental airplane, N321TR, registered to and operated by a private pilot, collided with the ground while turning base to final at a private airstrip in Blounts Creek, North Carolina. The personal flight was operated under the provision of Title 14 CFR Part 91. Visual meteorological conditions prevailed and no flight plan was filed. The airplane was substantially damaged. The pilot was fatally injured. The flight originated from the same private airstrip in Blounts Creek, North Carolina, on May 6, 2004 at 1832. The circumstances and purpose of the flight are unknown. If the pilot completed a preflight inspection of the airplane and fuel system before takeoff are also unknown. However, according to a witness, the airplane was on a base to final for the grass strip runway when the left wing dipped and the airplane went straight into the ground. The airplane came to rest in a field with a nose down attitude, 100 yards northwest of the runway. Based on the GPS track data recovered from the airplane, the flight duration was one minute and twenty seconds. Examination of the wreckage site found the airplane in the immediate area, approximately 35 degrees in a nose down attitude. The engine was buried several inches into the ground and displaced aft into the cockpit area. Examination of the airplane revealed the fuselage was buckled, the empennage was deflected towards the right side, both wings had leading edge crush damage, the left wing ribs were broken and the right main wheel was separated. The examination also revealed that there was six pounds of lead weight added to the tail section at the bottom of the horizontal stabilizer and there were no problems found with the flight controls. The engine was equipped with two carburetors. One carburetor was separated from the engine, and the other carburetor remained with the engine assembly. The examination of the carburetor that remained with the engine disclosed a small amount of corrosion in the bowl. Examination of the carburetor that was found separated from the engine disclosed a small amount of fuel and water in the bowl. There were two inline fuel filters installed in the fuel system, one filter for each carburetor. The examination of the filters also disclosed an undetermined amount of water. The only fuel drain installed in the fuel system was installed on the bottom of the header tank. When the drain assembly was removed from the header tank, four ounces of water were recovered from the header tank. The left wing tank had no drain assembly installed but about 12 ounces of water were recovered from that tank. The right fuel tank had been separated from the airframe and was empty. The Medical Examiner at Pitt County Memorial Hospital, Greenville, North Carolina conducted the autopsy of the pilot on May 8, 2004. The reported cause of death was "multiple injuries due to aircraft crash". The Forensic Toxicology Fatal Accident Report by the Federal Aviation Administration in Okalahoma City, Okalahoma detailed the results of the postmortem toxicology of specimens from the pilot. The report revealed that diphenhydramine was present in urine but not detected in blood. No carbon monoxide or cyanide was detected in blood and no ethanol was detected in urine. A review of the pilot's flight log disclosed that he had accumulated a total of 485 hours and had flown 5 hours in the Riggs Skyraider I. The pilot was issued a private pilot flight certificate for single engine land airplanes on March 28, 1973. The pilot's last third class medical certificate was issued on May 29, 2002, no limitations were listed on the certificate. The airplane was issued a special airworthiness certificate dated November 22, 2003. ## Aircraft - Registration: [N321TR](https://openairdocs.org/deregistered/N321TR-2010-01-27), registration cancelled 2010-01-27, S/N 145, built 2003 (OpenAirDocs) - Reported make and model: Riggs Skyraider 1 - Registry model: [Riggs Thomas W SKYRAIDER 1](https://openairdocs.org/model/riggs-thomas-w-skyraider-1) (registry code 0561553) (OpenAirDocs) - Registry engine: [Rotax SEE BOMBADIER](https://openairdocs.org/engine/rotax-see-bombadier) (registry code 55555, reciprocating) (OpenAirDocs) - Category: Airplane, amateur-built - Serial number: 145 - Airframe hours: 5 - Engines: Rotax 503 DCDI 46 horsepower reciprocating - Damage: Substantial damage - Flight: Personal, Part 91 - Registered owner: Thomas W. Riggs - Airworthiness certificate: Special, Experimental (Special) - Last inspection: Annual, November 22, 2003, 3 hours before - Departed: Blounts Creek, NC - Airport: Private Strip ## Flight crew As NTSB recorded them. NTSB leaves out names. - Pilot; age 50; injuries: fatal; private; airplane ratings: single-engine land; medical: class 3, valid medical--no waivers/lim.; last flight review February 3, 2002; seat: single; toxicology performed; flight hours: 485 total, 5 in this make and model ## Weather - Conditions: Visual (VMC), Day - Wind: 210° at 4 knots - Visibility: 10 statute miles - Temperature: 82 °F, dew point 52 °F - Altimeter: 30.10 inHg - Observed at: KOCW, 19 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 20040506017559A](https://openairdocs.org/incident/20040506017559A), May 6, 2004: Amtr SKYRAIDER1, Blounts Creek, NC, Destroyed, 1 fatal. (-23) On may 6, 2003 aircraft N321TR, an experimental amateur homebuilt aircraft was operating in the local area of Blounts Creek, NC when aircraft impacted… 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.