CHI04LA040

NTSB accident investigation · Clement-Kazmierczak Sorrell SNS-7 · Highmore, SD · December 6, 2003

Accident · No injuriesLimited investigationFinal report
Date
December 6, 2003, 10:30 local (16:30 UTC)
Place
Highmore, SD
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N7543EClement-Kazmierczak Sorrell SNS-7
Weather
Visual (VMC) · Day
Status
Completed · report June 2, 2004
Report
Approved by Office Director
Parties
FAA-Rapid City FSDO
FAA report
20031206032419A
Case key
58487

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 unsuitable terrain for landing encountered by the pilot. Contributing factors were the grass runway surface and the snowbank.

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.

On ground/water encounter with terrain/waterLanding - roll
Unsuitable terrain or takeoff/landing/taxi area - encounteredPilot in commandCause
Terrain condition - grassFactor
Terrain condition - snowbankFactor
Nose overLanding - roll

Analysis

The amateur-built experimental biplane was substantially damaged when it hit a snow bank and nosed over during landing. The pilot reported that prior to the flight he contacted the owner of the private grass strip to verify runway condition. The owner reportedly indicated that the runway was acceptable for use. The pilot noted that upon arrival the wind was from the southeast about 10 miles per hour. He stated that he set-up and landed to the south. "After landing, I hit a small snowdrift, added power and the plane nosed over," according to the pilot. He reported no failures or malfunctions with the aircraft or engine prior to the accident.

Factual narrative

On December 6, 2003, at 1030 central standard time, an amateur-built experimental biplane Clement-Kazmierczak Sorrell SNS-7 airplane, N7543E, piloted by a private pilot, was substantially damaged when it hit a snow bank and nosed over during landing. The accident occurred at a private airstrip (2,500 feet by 75 feet, turf) approximately 15 miles north of Highmore, South Dakota. Visual meteorological conditions prevailed at the time. The flight was operating under 14 CFR Part 91 and was not on a flight plan. The pilot and passenger reported no injuries. The flight departed the Converse County Airport, Douglas, Wyoming, at 0715 mountain standard time, with the private airstrip as the intended destination.

In his written statement, the pilot reported that prior to the flight he contacted the owner of the private grass strip to verify runway condition. The owner reportedly indicated that the runway was acceptable for use. The pilot noted that upon arrival the wind was from the southeast about 10 miles per hour. He stated that he set-up and landed to the south. "After landing, I hit a small snowdrift, added power and the plane nosed over," according to the pilot.

The pilot reported no failures or malfunctions with the aircraft or engine prior to the accident.

Aircraft

Registration
N7543E
Reported as
Clement-Kazmierczak Sorrell SNS-7
Category
Airplane, amateur-built
Serial number
247
Airframe hours
727
Engine
Lycoming O-360-A1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Condition · November 14, 2003 · 13 hours before
Departed
DGW · Douglas, WY
Destination
PVT · Highmore, SD
Airport
PVT, runway 18, 2,500 × 75 ft, grass/turf

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
51
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, Valid Medical--w/ waivers/lim
Last flight review
October 20, 2003
Seat
Left
Flight hours
3,123 total · 553 in this make and model · 3,123 as pilot in command · 42 in the last 90 days · 17 in the last 30 days · 2 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
140° at 21 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
34 °F, dew point 18 °F
Altimeter
29.85 inHg
Observed at
PIR, 48 nm away

FAA reports on this event · 1

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