DEN02LA027

NTSB accident investigation · Knight BD-4 · Kemmerer, WY · February 20, 2002

Accident · No injuriesLimited investigationFinal report
Date
February 20, 2002, 12:30 local (19:30 UTC)
Place
Kemmerer, WY
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Initial climb
Aircraft
N84RLKnight BD-4
Weather
Visual (VMC) · Day
Status
Completed · report July 25, 2002
Report
Approved by Office Director
Parties
FAA Flight Standards Fied Office
FAA report
20020220002799A
Case key
54224

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

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Probable cause

The NTSB’s determination of the probable cause, and any contributing factors.

The pilot's failure to maintain directional control during takeoff, which resulted in a collision with a snowbank. A contributing factor was the high crosswind.

Analysis

After liftoff, a quartering headwind pushed the airplane to the left side of the runway. The left main gear struck a snow bank and airspeed dropped. The pilot felt he could not clear obstacles ahead and decided to land in the snow. The left main landing gear collapsed, and the left wing then struck the snow. According to the pilot, the wind was from 260 degrees at 20 knots when he started his takeoff on runway 22.

Factual narrative

On February 20, 2002, approximately 1230 mountain standard time, a Knight BD-4, N84RL, operated by the pilot, was substantially damaged following loss of control during takeoff at Kemmerer Municipal Airport, Kemmerer, Wyoming. The pilot and his passenger were not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the pleasure flight being conducted under Title 14 CFR Part 91. The flight was originating at the time of the accident.

According to the pilot's accident report, the wind was from 260 degrees approximately 20 knots when he started his takeoff roll on runway 22. When the airplane was approximately 8 feet off the ground, the quartering headwind "seemed stronger," and he used "full right rudder to crab into the wind." He said, "The wind pushed me to the left and the left gear hit the top" of a snow bank, turning the airplane "perpendicular to the wind." Airspeed dropped from 75 MPH to 60 MPH and the controls felt "sluggish." The pilot said he didn't feel he could avoid a windsock and fence ahead, so he closed the throttle and landed in the snow. The left gear collapsed when it hit the snow. The left wing then struck the snow, denting the leading edge and tearing off the wing tip.

Sequence of events

NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.

In flight collision with terrain/waterTakeoff - initial climb
Directional control - not maintainedPilot in commandCause
Weather condition - high windFactor
Weather condition - crosswindFactor
Terrain condition - snowbank
Airspeed - low
Forced landingDescent - emergency
Terrain condition - ground
Terrain condition - snow covered

Aircraft

Registration
N84RL
Reported as
Knight BD-4
Category
Airplane, amateur-built
Serial number
84
Airframe hours
187
Engine
Lycoming O-320-B1A, 160 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Registered owner
Harold O. Stockman
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · October 2, 2001 · 35 hours before
Departed
EMM · Kemmerer, WY
Destination
EKO · Elko, NV
Airport
EMM · Kemmerer Municipal, runway EMM, 2,850 × 60 ft, concrete

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
48
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--no waivers/lim.
Last flight review
February 2, 2002
Seat
Front
Flight hours
479 total · 30 in this make and model · 439 as pilot in command · 36 in the last 90 days · 22 in the last 30 days

Weather

Conditions
Visual (VMC) · Day
Wind
250° at 7 knots
Visibility
10 statute miles
Lowest ceiling
4,000 ft broken
Temperature
30 °F, dew point 28 °F
Altimeter
30.12 inHg
Observed at
EVW, 51 nm away

Docket · 3

The files NTSB released with the investigation on July 3, 2002, on NTSB’s docket system: statements, records, photos and specialists’ reports. 435 KB in all.

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.