NTSB CAROL · Event
Event FTW00LA026
Registry · N698N
FAA Aircraft Registry record.
Make / Model
WACO KNF
Year of manufacture
1930 · 69 years old at event
Engine
KINNER K5 SERIES (100 hp)
Seats / Engines
3 seats · 1 engine
Last airworthiness date
19820514
ADS-B equipped
Yes — Mode-S A9499A
Registrant of record
MURRAY KEVIN D
Source: FAA Aircraft Registry (releasable master file).
Aircraft involved
Probable cause & findings
The inability of the pilot to maintain control of the airplane as a result of a downdraft.
Factual narrative
On November 5, 1999, at 1745 central standard time, a Waco KNF biplane, N698N, was substantially damaged when it impacted trees and terrain during the final approach to the Promise Land Airpark Airport, Midway, Arkansas. The airplane was registered to and operated by the pilot. The commercial pilot and his passenger were not injured. Visual meteorological conditions prevailed for the 14 Code of Federal Regulations Part 91 personal flight, and a flight plan was not filed. The local flight originated from the Promise Land Airpark Airport at 1730. According to the pilot, he maneuvered the airplane onto the final approach leg for runway 18, a 2,000 foot turf airstrip. He stated that the airplane was at 25 feet agl and overflying a road and trees, located north of the approach end of the runway, when he "felt a rapid sink of the aircraft." The pilot "applied full throttle and attempted to lower the nose of the aircraft, but within what seemed like a couple of seconds" the airplane's left wing contacted a tree. Subsequently, the airplane contacted the ground and came to rest upright. The pilot stated that he attributed the loss of altitude to "wind shear or [a] downdraft." A pilot, who executed an approach and full stop landing on runway 18 approximately 5 minutes prior to the accident airplane, reported that his airplane's airspeed "dropped suddenly from 60mph to 40mph," while crossing trees on final approach. He added that he attributed the loss of airspeed to "an unexpected tailwind or downdraft." The FAA inspector, who examined the airplane at the site, reported that the front wing spars for the upper and lower left wings were structurally damaged. The left elevator was bent, the left main landing gear assembly separated from the airframe, and the engine separated from the airframe. The airplane encountered a downdraft while on final approach and contacted trees. According to the pilot, the airplane was at 25 feet agl, crossing a road and trees, at the approach end of runway 18, when he 'felt a rapid sink of the aircraft.' The pilot 'applied full throttle and attempted to lower the nose of the aircraft, but within what seemed like a couple of seconds' the airplane's left wing contacted trees. Subsequently, the airplane impacted the ground and came to rest upright. The pilot stated that he attributed the loss of altitude to a 'downdraft.' Another pilot, who flew the same approach 5 minutes prior to the accident airplane, reported that his aircraft experienced a 20 mph loss of airspeed while on final approach. That pilot added that he attributed the loss of airspeed to a 'downdraft.' Source: NTSB Aviation Accident Database (Pre-2008 Archive) Retrieved: 2026-02-12
Verbatim from NTSB's published report. Source file
NTSB_1999_FTW00LA026.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 ↗