WPR11CA229

NTSB accident investigation · Rockwell International S-2R · Kahlotus, WA · May 18, 2011

Accident · No injuriesData collectionFinal report
Date
May 18, 2011, 16:15 local (23:15 UTC)
Place
Kahlotus, WA
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4996XRockwell International S-2R
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report August 3, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
79159

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 pilot's failure to maintain directional control during takeoff.

Findings · 3

NTSB’s coded findings. Those marked are part of the probable cause; the rest are factors or other findings. Under each, the cases with the same finding.

Performance/control parameters: directional controlAircraft › Aircraft oper/perf/capability · Not attained/maintainedRockwell International S-2R: 6 casesAll aircraft: 3,958 casesProbable cause
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeRockwell International S-2R: 2 casesAll aircraft: 1,008 cases

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Analysis

The pilot reported that he attempted to take off with a strong crosswind. During the takeoff sequence, the airplane veered off the airstrip onto soft dirt and subsequently nosed over. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal flight.

Factual narrative

The pilot reported that he attempted to takeoff with a strong crosswind. During the takeoff sequence, the airplane veered off the airstrip onto soft dirt and subsequently nosed over. Weather reporting stations within 30 nautical miles (nm) of the airstrip reported wind from 324 degrees, varying from 6 to 7 knots and gusting up to 16 knots. The pilot reported that there were no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal flight.

Aircraft

Registration
N4996X
Reported as
Rockwell International S-2R
Category
Airplane
Serial number
2138R
Airframe hours
23,000
Engine
P&W R1340 SERIES, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Air-Trac Inc.
Registered owner
Air-Trac Inc.
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · March 1, 2011 · 200 hours before
Departed
4WA6 · Kahlotus, WA
Destination
4WA6 · Kahlotus, WA
Airport
4WA6 · Hille-Kimp Airstrip, runway 02, 2,600 × 26 ft, gravel

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
68
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
January 15, 2010
Seat
Center
Flight hours
26,500 total · 22,000 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
300° at 12 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
72 °F, dew point 34 °F
Altimeter
29.81 inHg

Docket · 1

The files NTSB released with the investigation on May 27, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 592 KB in all.

Other investigations on N4996X · 1

Matched to the same aircraft by N-number and date.