WPR13CA117

NTSB accident investigation · Cessna 170B · Sunburst, MT · February 6, 2013

Accident · No injuriesData collectionFinal report
Date
February 6, 2013, 14:30 local (21:30 UTC)
Place
Sunburst, MT
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N2619DCessna 170B
Defining event
Takeoff: Loss of control in flight
Weather
Visual (VMC) · Day
Status
Completed · report June 12, 2013
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
Case key
86165

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 compensate for the strong, gusting wind conditions, which resulted in a loss of airplane 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 parametersAircraft › Aircraft oper/perf/capability · Not specifiedCessna 170B: 5 casesAll aircraft: 1,269 cases
Use of equip/info: aircraft controlPersonnel issues › Task performance · PilotCessna 170B: 91 casesAll aircraft: 9,295 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Effect on operationCessna 170B: 13 casesAll aircraft: 1,199 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 taxied the airplane onto the runway most aligned with the wind and began the takeoff roll. Just as the airplane became airborne, a gust of wind lifted the right wing, and the left wing tip contacted the ground despite the pilot's application of full right aileron. The airplane came to rest, nose-down, facing opposite the direction of intended travel and sustained substantial damage to both wings and the left lift strut. The pilot estimated that the wind was 38 knots and gusting to 42 knots at the time of takeoff. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Factual narrative

The pilot aligned the airplane into the wind and proceeded with the takeoff roll. As the airplane got airborne a gust of wind lifted the right wing and the left wing tip contacted the ground despite the pilot's application of full right aileron. The airplane was pulled to the left by the ground contact and came to rest on its nose facing the opposite direction of intended travel. During the accident sequence the airplane sustained substantial damage to the outboard sections of both wings and the left lift strut. The pilot estimated that the wind was 38 knots gusting to 42 knots. The pilot reported no preimpact mechanical malfunctions or failures with the airplane that would have precluded normal operation.

Aircraft

Registration
N2619D
Reported as
Cessna 170B
Category
Airplane
Serial number
20771
Airframe hours
3,070
Engine
Lycoming O&VO-360 SER, 180 horsepower, reciprocating
Damage
Substantial damage
Flight
Personal · Part 91
Operator
Inman Steve
Registered owner
Inman Steve
Airworthiness certificate
Standard, Normal
Last inspection
Annual · February 9, 2012
Departed
K8U5 · Sunburst, MT
Destination
KBIL · Billings, MT
Airport
K8U5 · Sunburst Airport, runway 23, grass/turf

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
54
Injuries
None
Certificate
Private
Airplane ratings
Single-engine land
Medical
Class 3, With waivers/limitations
Last flight review
August 28, 2011
Seat
Left
Flight hours
568 total · 404 in this make and model

Weather

Conditions
Visual (VMC) · Day
Wind
260° at 25 knots, gusting 34
Visibility
10 statute miles
Lowest ceiling
None
Temperature
34 °F, dew point 21 °F
Altimeter
29.92 inHg
Observed at
KCTB, 25 nm away

Docket · 1

The files NTSB released with the investigation on April 3, 2013, on NTSB’s docket system: statements, records, photos and specialists’ reports. 723 KB in all.

Other investigations on N2619D · 3

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