ANC11CA011

NTSB accident investigation · Miller Gregory Scott GOT Rocks · Anchorage, AK · January 29, 2011

Accident · No injuriesData collectionFinal report
Date
January 29, 2011, 15:30 local (23:30 UTC)
Place
Anchorage, AK
Injuries
2 uninjured
Damage
Substantial damage
Phase of flight
Landing
Aircraft
N9015UMiller Gregory Scott GOT Rocks
Defining event
Landing-landing roll: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report June 8, 2011
Report
Approved by Office Director
NTSB office
Alaska Regional Office
Parties
Federal Aviation Administration (Operations)
FAA report
20110129001479A
Case key
78256

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 selection of an unsuitable landing/takeoff area with an unfavorable wind.

Findings · 4

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.

Terrain: mountainous/hilly terrainEnvironmental issues › Physical environment · Contributed to outcomeMiller Gregory Scott GOT ROCKS: 1 caseAll aircraft: 329 cases
AircraftAircraft › Aircraft oper/perf/capability · Capability exceededMiller Gregory Scott GOT ROCKS: 1 caseAll aircraft: 63 cases
Wind: sudden wind shiftEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeMiller Gregory Scott GOT ROCKS: 1 caseAll aircraft: 114 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 said that he was attempting a touch-and-go landing in a ski-equipped airplane on a snow-covered mountaintop site, which was surrounded by higher mountains. Before beginning his approach to the site, he determined the wind conditions, and then planned an easterly approach into a 10-mph headwind. After landing, he turned the airplane to the north in preparation for takeoff and, as it passed out of a wind-protected area, a strong southerly wind lifted the airplane's tail. The pilot was unable to control the airplane in the strong wind and it nosed over, sustaining substantial damage to the wings and empennage. The pilot reported that there were no preaccident mechanical anomalies with the airplane.

Factual narrative

The pilot said he was attempting a touch-and-go landing in a ski-equipped airplane on a snow-covered mountaintop site, which was surrounded by higher mountains. Before beginning his approach to the site, he determined the wind conditions, and then planned an easterly approach into a 10 mph headwind. After landing, he turned the airplane to the north in preparation for takeoff, and as it passed out of a wind-protected area, a strong southerly wind lifted the airplane's tail. The pilot was unable to control the airplane in the strong wind, and it nosed over, sustaining substantial damage to the wings and empennage. The pilot reported that there were no preaccident mechanical anomalies with the airplane.

Aircraft

Registration
N9015U
Reported as
Miller Gregory Scott GOT Rocks
Category
Airplane, amateur-built
Serial number
1
Airframe hours
386
Engine
Lycoming O-360-C1A, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
John Henry Swan
Registered owner
John Henry Swan
Airworthiness certificate
Special, Experimental (Special)
Last inspection
Annual · December 13, 2010 · 21 hours before
Departed
Anchorage, AK
Destination
Anchorage, AK
Airport
runway 33

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
46
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land, Single-engine sea
Medical
Class 3, Without waivers/limitations
Seat
Front
Flight hours
1,259 total · 879 in this make and model · 1,259 as pilot in command · 74 in the last 90 days · 29 in the last 30 days · 3 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 46 knots, gusting 57
Visibility
10 statute miles
Lowest ceiling
None
Temperature
21 °F

Docket · 1

The files NTSB released with the investigation on March 29, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 599 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.

Other investigations on N9015U · 1

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