CEN12LA126

NTSB accident investigation · Aviat A1 · Somerset, CO · January 6, 2012

Accident · No injuriesLimited investigationFinal report
Date
January 6, 2012, 16:00 local (23:00 UTC)
Place
Somerset, CO
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N127AKAviat A1
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report October 9, 2012
Report
Approved by Office Director
NTSB office
Central Region
Parties
Federal Aviation Administration
FAA report
20120106000159A
Case key
82648

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 inadequate takeoff planning/preparation, which resulted in the airplane impacting a snow drift during the takeoff roll.

Findings · 2

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.

Planning/preparationPersonnel issues › Task performance · PilotAviat A-1B: 3 casesAll aircraft: 113 casesProbable cause
Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Contributed to outcomeAviat A-1B: 2 casesAll aircraft: 219 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 attempted a takeoff on a snow-covered runway that he had landed on earlier in the day. The snow was about 6 inches deep. During the takeoff roll, the airplane struck a snow drift and nosed over. The pilot reported no mechanical anomalies that would have precluded normal operation.

Factual narrative

On January 6, 2012, about 1600 mountain standard time, an Aviat Aircraft Inc A-1B, N127AK, nosed over when it struck a snow drift during takeoff roll on a snow covered runway at Abbott Ranch Private Airstrip near Somerset, Colorado. The certificated commercial pilot was uninjured. The airplane sustained substantial damage. The airplane was registered to Plane Living LLC and operated by the pilot under the provisions of 14 Code of Federal Regulations Part 91 as a personal flight. Visual meteorological conditions prevailed and a flight plan had not been filed for the flight destined for Montrose Regional Airport, Montrose, Colorado. The pilot stated that he departed Montrose Regional Airport, Montrose, Colorado, about 1330, en route to Abbott Ranch Private Airstrip to check on his cabin. He said that when he landed, the runway was covered with about 6 inches of snow. The pilot stated that at the time of departure he was attempting a maximum performance takeoff on runway 03 (1,600 feet by 75 feet, snow covered turf). The direction of takeoff was uphill. He felt the tailwheel digging into the snow on the runway shortly after the takeoff roll began. About 300 feet down the runway, the tail lifted and the main landing gear wheels struck a one foot high snow drift. The airplane then nosed over. The pilot stated in his postaccident recommendation that the accident might have been prevented by packing down the snow on the runway using a snowcat or other equipment. The airplane was equipped with Alaska Bush 29 inch tires.

Aircraft

Registration
N127AK
Reported as
Aviat A1 (B)
Category
Airplane
Serial number
2059
Airframe hours
527
Engine
Lycoming O&VO-360AIP, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Pilot
Registered owner
Plane Living LLC
Airworthiness certificate
Standard, Normal
Last inspection
Annual · September 8, 2011
Departed
PVT · Somerset, CO
Destination
MTJ · Montrose, CO
Airport
PVT · Abbott Ranch Private Airstrip, runway 03, 1,300 × 75 ft, snow

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
59
Injuries
None
Certificates
Private, Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 3, Without waivers/limitations
Last flight review
July 6, 2010
Seat
Front
Flight hours
3,463 total · 236 in this make and model · 3,277 as pilot in command · 29 in the last 90 days · 1 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
320° at 3 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
41 °F, dew point 16 °F
Altimeter
30.05 inHg
Observed at
ASE, 64 nm away

Docket · 1

The files NTSB released with the investigation on August 2, 2012, on NTSB’s docket system: statements, records, photos and specialists’ reports. 699 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.