DEN89LA109
1989-04-17 · GLENWOOD SPGS, Colorado, United States · None · 1 aircraft · Status: Completed
Airport GLW
Aircraft involved
Probable cause & findings
INADEQUATE COMPENSATION FOR THE WIND CONDITIONS BY THE PILOT, RESULTING IN A LOSS OF CONTROL OF FINAL APPROACH. CONTRIBUTING TO THE ACCIDENT WAS THE DOWNDRAFT.
Factual narrative
THE PRIVATE PLT/A&P MECHANIC WAS FERRYING AN ACFT TO HIS FBO TO PERFORM AN ANNUAL INSPECTION. DURING FINAL APPROACH TO RWY 32, A 3,300 X 50 FT, ASPHALT RWY, THE PLT SAID HE ENCOUNTERED STRONG TURBULENCE. THE ACFT TOUCHED DOWN 200 FT SHORT OF THE RWY, ON A PAVED HIGHWAY. THE ACFT SLID ONTO THE RWY AND MADE A SLOW LEFT TURN, COMING TO REST 300 FEET LEFT OF THE RWY CENTERLINE, WITH COMPLETE LANDING GEAR COLLAPSE. A POST ACCIDENT INSPECTION SHOWED EVIDENCE THAT THE LEFT TIRE TOUCHED DOWN HARD, AND THE LEFT STRUT MADE SCRAPE MARKS WITHIN 5 FT. THE ACFT BOUNCED BACK INTO THE AIR AND AT THE NEXT TOUCHDOWN, THE LEFT PROPELLER MADE STRIKE MARKS. THE PILOT SAID HE THOUGHT THE ACFT HAD HIT A LOW LEVEL WIND SHEAR ON FINAL. HE ALSO SAID HE THOUGHT THE LEFT AXLE BROKE OFF DUE TO FATIGUE. AN FAA AIRWORTHINESS INSPECTOR EXAMINED THE AXLE AND STATED THAT HE DISCOVERED NO EVIDENCE OF PRE-EXISTING CRACKS OR FATIGUE. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1989_DEN89LA109.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
Matched on aircraft type or causal vocabulary (wind shear, loss of control, turbulence). All research papers
- NASA NTRS 2019 · Contractor Report (CR) An Examination of Aviation Accidents Associated with Turbulence, Wind Shear and Thunderstorm
The focal point of the study reported here was the definition and examination of turbulence, wind shear and thunderstorm in relation to aviation accidents.
- NASA NTRS 2019 · Preprint (Draft being sent to journal) Convectively Induced Turbulence Encountered During NASA's Fall-2000 Flight Experiments
Aircraft encounters with atmospheric turbulence are a leading cause of in-flight injuries aboard commercial airliners and cost the airlines millions of dollars each year.
- NASA NTRS 2019 · Technical Memorandum (TM) Some aspects of wind shear in the upper atmosphere
Hydrodynamic turbulence and wind shear in upper atmosphere
- Embry-Riddle Scholarly Commons 2019 · Journal article (IJAAA) Low Level Turbulence Detection For Airports
Abstract—— Low level wind shear and turbulence present a serious safety risk to aircraft during the approach, landing and take-off phases.
- Embry-Riddle Scholarly Commons 2018 · Journal article (IJAAA) Evaluating the Effect of Turbulence on Aircraft During Landing and Take-Off Phases
—— Low level wind shear and turbulence present a serious safety risk to aircraft during the approach, landing and take-off phases.
- arXiv 2026 · arXiv preprint Direct Numerical Simulations of Ice-Ocean Boundary Turbulence
Turbulent heat and freshwater transport at ice-ocean interfaces controls glacier and iceberg melt rates, yet the underlying physics remains poorly constrained.