NTSB CAROL · Event
Event SEA05LA164
Aircraft involved
Probable cause & findings
The pilot's failure to maintain aircraft control while maneuvering in the traffic pattern for landing. The pilot's failure to maintain a proper altitude was a factor.
Factual narrative
On August 4, 2005, about 1515 mountain daylight time, a Burkhart Grob G103 Twin Astir glider, N153SS, registered to and operated by the pilot as a 14 CFR Part 91 personal flight, collided with the terrain at the northeast end of the Reed Memorial Airport, Driggs, Idaho. Visual meteorological conditions prevailed at the time and no flight plan was filed for the local flight. The glider was substantially damaged and the private pilot, the sole occupant, was fatally injured. The glider's tow plane pilot reported that during the pre-tow briefing, the glider pilot stated that he wanted to do three pattern tows and one high tow. The pilot then pulled the glider around to position for the takeoff tow. The tow plane pilot stated that shortly after 1500, he started the takeoff without any problems. The pilot flew a circling turn to the right and went to mid-field and made another right turn crossing the runway, and climbing to 1,200 feet above ground level (agl) for the release. The tow pilot then circled to land on runway 21. The tow pilot stated that as he was taxiing back he noticed the glider, no higher than 75 feet agl, pitch nose down. The tow pilot stated that the glider was too low and just before it hit the ground, it looked like the nose was starting to come up. The glider collided with the ground short of runway 21 in about a 45 degree nose down attitude. A Federal Aviation Administration Inspector from the Salt Lake City, Utah, Flight Standards District Office responded to the accident site. The inspector stated that the initial ground impact was identified by an impact crater. Following a path to the north northwest, debris fragments were located along the surface to include the tail surfaces and interior items. The main wreckage to include the wings and fuselage was located approximately 195 feet from the initial impact crater. The fuselage came to rest inverted about 600-800 feet from the end of the runway. All flight control surfaces were accounted for. Flight and maintenance records provided to the FAA by a member of the glider club indicated that the pilot had accumulated a total flight time in all aircraft of about 144 hours. The logbook provided indicated flight time starting in the glider involved in the accident was in July 2002. About 24 hours had been accumulated since this time. The pilot held a private pilot certificate in glider operations only. An annual inspection of the glider was accomplished on April 1, 2005. About 16 hours had been accumulated since the inspection. The glider's tow plane pilot reported that during the pre-tow briefing, the glider pilot stated that he wanted to do three pattern tows and one high tow. The pilot then pulled the glider around to position for the takeoff tow. The tow plane pilot stated that shortly after 1500, he started the takeoff without any problems. The pilot flew a circling turn to the right and went to mid-field and made another right turn crossing the runway, and climbing to 1,200 feet above ground level (agl) for the release. The tow pilot then circled to land on runway 21. The tow pilot stated that as he was taxiing back he noticed the glider, no higher than 75 feet agl, pitch nose down. The tow pilot stated that the glider was too low and just before it hit the ground, it looked like the nose was starting to come up. The glider collided with the ground short of runway 21 in about a 45 degree nose down attitude. Post accident inspection of the wreckage did not disclose evidence of a mechanical failure or malfunction. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_2005_SEA05LA164.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
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Academic papers and agency reports matching this event's aircraft type or causal vocabulary (maintenance). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- Embry-Riddle Scholarly Commons 2026 · Journal article (IJAAA)
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- Semantic Scholar 2025 · Article (Applied Sciences)
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- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
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- Embry-Riddle Scholarly Commons 2024 · Journal article (JAAER)
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In the field of aviation, safety is a critical cornerstone, and the operation of Unmanned Aerial Vehicle (UAV) systems is deeply connected with this principle.
- Embry-Riddle Scholarly Commons 2024 · Journal article (IJAAA)
Just Culture in Aviation: A Metaphorical Study on Aircraft Maintenance Students
Just Culture, a sub-dimension of safety culture, has been a prominent and debated topic in aviation safety in recent years.
- Embry-Riddle Scholarly Commons 2024 · Journal article (IJAAA)
Performance PRISM: A Comprehensive Framework For Performance Measurement In Aircraft Maintenance
Aircraft maintenance is governed by rigorous safety requirements and high operational complexity, demanding robust performance measurement frameworks to ensure optimal maintenance practices.
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