NTSB CAROL · Event
Event DEN89LA078
Registry · N9092W
FAA Aircraft Registry record.
Make / Model
WEBER DEL DAL-1
Year of manufacture
1997
Engine
LYCOMING 0-320 SERIES (180 hp)
Seats / Engines
2 seats · 1 engine
Last airworthiness date
19970927
ADS-B equipped
Yes — Mode-S AC934E
Registrant of record
LONG EARL V III DBA
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
INADEQUATE COMPENSATION FOR WIND CONDITIONS BY THE PILOT, WHICH RESULTED IN A LOSS OF AIRCRAFT CONTROL. THE ADVERSE WIND CONDITIONS AND SNOWBANK WERE RELATED FACTORS.
Factual narrative
A PRIVATE PLT AND FOUR PAX WERE MAKING A PERSONAL IFR FLIGHT. A TAKEOFF WAS ATTEMPTED ON RWY 35, WITH SNOW DRIFTS ON BOTH SIDES. WIND WAS ESTIMATED AS 320 DEG AT 25 KNOTS, WITH GUSTS TO 35 KNOTS. THE PILOT SAID THAT AT ROTATION, THE PLANE HIT WIND SHEAR FROM 260 DEG, THAT LIFTED THE LEFT WING. DIRECTIONAL CONTROL WAS LOST AND THE AIRPLANE SETTLED BACK ON THE RWY. THE LEFT MAIN WHEEL STRUCK A SNOW BANK AND THE ACFT SPUN LEFT 180 DEG. THE TAIL SECTION WENT THROUGH THE SNOW BANK AND THE PLANE DEPARTED THE RUNWAY TO THE LEFT. THE PLT SAID THAT WHEN HE EXITED THE ACFT, THE WIND WAS FROM 190 DEG AT AN ESTIMATED 40 KNOTS. A WITNESS VERIFIED A 180 DEG WIND SHIFT AND ESTIMATED THE WIND SPEED AT 40 KNOTS. Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1989_DEN89LA078.txt.
Findings + structured fields enriched from FAA avall.mdb.
Full investigation docket on
data.ntsb.gov ↗.
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Related research
What the literature says.
Academic papers and agency reports matching this event's aircraft type or causal vocabulary (wind shear). Sourced from NASA NTRS, NTSB Safety Studies, FAA CAMI, AOPA Air Safety Institute, Embry-Riddle Scholarly Commons, arXiv, and the Semantic Scholar academic graph.
- NASA NTRS 2019 · Conference Paper
Optimal recovery from microburst wind shear
The flight path of a twin-jet transport aircraft is optimized in a microburst encounter during approach to landing. The objective is to execute an escape maneuver that maintains safe ground clearance …
- 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 · Conference Paper
Analysis of extreme wind shear
New methods utilizing extreme value statistical theory are applied in the analysis of the largest wind component shear in a wind profile as a function of shear layer thickness and season.
- NASA NTRS 2019 · Technical Memorandum (TM)
Probabilities of zero wind shear phenomena based on Rawinsonde data records
Probabilities of zero wind shear occurence and depth based on rawinsonde data records
- NASA NTRS 2019 · Contractor Report (CR)
A Wind Shear Mechanism for Producing Sporadic E by Concentrating Minor Meteoric Ions
Wind shear mechanism for producing sporadic E layer by concentrating minor meteoric ions
- NASA NTRS 2019 · Technical Memorandum (TM)
Some aspects of wind shear in the upper atmosphere
Hydrodynamic turbulence and wind shear in upper atmosphere
Browse the full corpus — academia portal ↗