WPR11CA098

NTSB accident investigation · Piper PA-18-150 · Austin, NV · January 13, 2011

Accident · No injuriesData collectionFinal report
Date
January 12, 2011, 16:00 local (Jan 13, 2011, 00:00 UTC)
Place
Austin, NV
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N4030ZPiper PA-18-150
Defining event
Takeoff: Nose over/nose down
Weather
Visual (VMC) · Day
Status
Completed · report May 26, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA FSDO
FAA report
20110112005199A
Case key
78153

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 the takeoff roll.

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/maintainedAll aircraft: 3,958 casesProbable cause
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotAll aircraft: 9,295 casesProbable cause
Runway/land/takeoff/taxi surface: snow/slush/ice covered surfaceEnvironmental issues › Physical environment · Contributed to outcomeAll 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 was on a local flight around his home airport when he decided to see how much snow was on the local mountains. He observed a ridge top airstrip where he had landed on several previous occasions, and saw that most of it was blown clear of snow. He overflew the airstrip, decided that it looked good, and made an uneventful landing. He walked around a bit, looked at snow depths, and then departed back to his home airport. During the takeoff roll, the airplane drifted too far to the right over what he thought was ground covered with light snow. It was actually a snow drift made from snow that had blown to the side of the ridge. The airplane started pulling to the right as a result of contact with the snow drift. The pilot still thought that the airplane would take off without difficulty, but the right main tire broke through the crust and dug in. The airplane nosed over onto the snow drift, resulting in substantial damage to the right wing and fuselage.

Factual narrative

The pilot was on a local flight around his home airport when he decided to see how much snow was on the local mountains. He observed a ridge top where he had landed on several previous occasions, and saw that most of it was blown clear of snow. He overflew the strip, and looked it over closely. He decided that it looked good, and made an uneventful landing. He walked around a bit, looked at snow depths, and then departed back to his home airport. During the takeoff roll, the airplane got a little too far to the right over onto what he thought was ground covered with light snow. It was actually a snow drift made from the snow that had blown to the side of the ridge. The airplane started pulling to the right as a result of contact with the snow drift. The pilot still thought that the airplane would take off without difficulty, but the right main tire broke through the crust and dug in. The airplane nosed over onto the snow drift. The pilot quickly shut off all switches, put his arm up to the ceiling to brace himself, and released his seat belt and shoulder harness. After just a few seconds, he went back into the airplane, shut off the fuel selector valve, and retrieved a snowmobile suit that he had in the baggage along with a global positioning system (GPS) unit, a personal locator beacon, and a survival kit. He was able to get a cell phone signal, and called his wife to set up a pick up point. He hiked, mostly in the dark, 2-3 miles with 3,000 feet of downhill elevation change through very deep snow to get to the pick up point.

Aircraft

Registration
N4030Z
Reported as
Piper PA-18-150 (150)
Category
Airplane
Serial number
18-7988
Airframe hours
1,935
Engine
Lycoming O-360-C4P, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Joe Dory
Registered owner
Joe Dory
Airworthiness certificate
Standard, Utility
Last inspection
Annual · November 6, 2010 · 15 hours before
Departed
Austin, NV
Destination
9U3 · Austin, NV

Flight crew

As NTSB recorded them. NTSB leaves out names.

Role
Pilot
Age
62
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, With waivers/limitations
Last flight review
October 7, 2010
Seat
Front
Flight hours
6,047 total · 855 in this make and model · 6,019 as pilot in command · 35 in the last 90 days · 8 in the last 30 days · 1 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
Calm
Visibility
10 statute miles
Lowest ceiling
None
Temperature
37 °F, dew point 30 °F
Altimeter
30.35 inHg
Observed at
KLOL, 90 nm away

Docket · 1

The files NTSB released with the investigation on January 21, 2011, on NTSB’s docket system: statements, records, photos and specialists’ reports. 316 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.