NTSB Identification: SEA08LA105
14 CFR Part 91: General Aviation
Accident occurred Monday, April 07, 2008 in Cheyenne, WY
Aircraft: Glasair Glasair III, registration: C-GGTM
Injuries: 1 Fatal.

This is preliminary information, subject to change, and may contain errors. Any errors in this report will be corrected when the final report has been completed.

On April 7, 2008, about 1600 mountain daylight time, an amateur built Glasair III airplane, C-GGTM, was substantially damaged when it impacted terrain near Cheyenne, Wyoming. The private pilot, sole occupant of the airplane, was killed. The airplane was registered to and operated by the pilot under the provisions of 14 Code of Federal Regulations (CFR) Part 91. Visual meteorological conditions prevailed at the nearest official weather reporting station and instrument meteorological conditions prevailed in the accident area. The personal cross-country flight originated from the South Big Horn County Airport, Greybull, Wyoming, about 1500 with an intended destination of the Larned-Pawnee County Airport (LQR), near Larned, Kansas. No flight plan was filed.

A witness located adjacent to the accident site reported hearing an airplane fly overhead at a low altitude followed by a muffled "thud" shortly after. The witness located the wreckage a few minutes later and called 911. The witness added that at the time he heard the airplane fly over, visibility was limited with near "whiteout conditions" due to heavy snow falling.

Examination of the wreckage by a Federal Aviation Administration (FAA) inspector revealed that the airplane impacted an open field and came to rest in an upright position. All of the primary flight controls were located at the accident site. The wreckage was recovered to a secure location for further examination.