NTSB Identification: CHI01FA298.
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division
Accident occurred Friday, August 31, 2001 in Grayslake, IL
Probable Cause Approval Date: 10/24/2002
Aircraft: Spears RV-6, registration: N910RS
Injuries: 1 Fatal.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
The amateur built, experimental airplane was destroyed by impact forces and subsequent ground fire about 1 mile west of the destination airport. The airplane departed controlled flight prior to ground impact. A witness reported the airplane was flying at about 500 feet above ground level (agl) and was circling towards the airport when the airplane "barreled" left, recovered, and then the nose of the airplane went straight down. Another witness reported seeing the airplane circling before the airplane nose dived into the terrain. The wreckage path was limited to the initial point of impact. The leading edges of the left and right wings were crushed and buckled aft along their outboard wing spans. The post accident inspection of the airplane revealed no preexisting anomalies. The Forensic Toxicology Fatal Accident Report prepared by the Federal Aviation Administration's Civil Aeromedical Institute indicated that 0.019 (ug/ml, ug/g) Tetrahydrocannabinol (Marihuana) and 0.043 (ug/ml, ug/g) Tetrahydrocannabinol Carboxylic Acid (Marihuana) were detected in the pilot's blood.
The National Transportation Safety Board determines the probable cause(s) of this accident to be: The pilot inadvertently stalled the airplane. A factor was the impairment due to marihuana. Full narrative available
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