WPR10CA444

NTSB accident investigation · Schweizer 164B · Murtaugh, ID · September 2, 2010

Accident · Minor injuriesData collectionFinal report
Date
September 2, 2010, 09:30 local (15:30 UTC)
Place
Murtaugh, ID
Injuries
1 minor
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N7502YSchweizer 164B
Defining event
Takeoff: Loss of control on ground
Weather
Visual (VMC) · Day
Status
Completed · report March 16, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
Federal Aviation Administration
FAA report
20100902044849A
Case key
77174

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 compensation for the wind and 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/maintainedSchweizer G-164B: 6 casesAll aircraft: 3,958 casesProbable cause
Wind: gustsEnvironmental issues › Conditions/weather/phenomena · Contributed to outcomeSchweizer G-164B: 2 casesAll aircraft: 1,199 cases
Wind: crosswindEnvironmental issues › Conditions/weather/phenomena · Response/compensationSchweizer G-164B: 2 casesAll aircraft: 1,008 casesProbable cause

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 during landing he noticed the wind intensity was increasing at the private airstrip. He departed again for his fifth aerial application flight of the day. While on the takeoff, as the tail was lifting off the ground, a gust of wind struck the airplane and it veered towards the right. The airplane exited the runway surface and struck a power pole, substantially damaging the wings, fuselage and empennage. The nearest weather reporting station, located about 13 miles from the accident airstrip, reported wind at 13 knots gusting to 19 knots. The pilot reported no preimpact mechanical failures or malfunctions with the airframe or engine.

Factual narrative

The pilot reported that he noticed the wind was picking up at the private airstrip when he landed from his fourth load of spray for the aerial application flight. During the takeoff roll of the pilot’s fifth load, as the tail was coming off the ground, a gust of wind struck the airplane and it veered towards the right. The airplane exited the runway environment and struck a power pole, substantially damaging the wings, fuselage and empennage. The nearest weather reporting station located about 13 miles to the west of the accident airstrip reported wind from 070 degrees at 13 knots gusting to 19 knots. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident.

Aircraft

Registration
N7502Y
Reported as
Schweizer 164B
Category
Airplane
Serial number
821B
Airframe hours
9,036
Engine
Garrett TPE331-1-151A, 665 horsepower, turbo prop
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Larry Wright
Registered owner
Ken Spray LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · May 3, 2010 · 388 hours before
Departed
N/A · Murtaugh, ID
Destination
N/A · Murtaugh, ID
Airport
N/A · Murtaugh Strip, runway 27, 2,800 × 70 ft, dirt

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
66
Injuries
Minor
Certificate
Commercial
Airplane ratings
Single-engine land, Multi-engine land
Instrument ratings
Airplane
Medical
Class 2, Without waivers/limitations
Last flight review
April 16, 2009
Seat
Single
Flight hours
18,063 total · 2,837 in this make and model · 17,912 as pilot in command · 367 in the last 90 days · 100 in the last 30 days · 8 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
70° at 13 knots, gusting 19
Visibility
10 statute miles
Lowest ceiling
None
Temperature
63 °F, dew point 37 °F
Altimeter
30.30 inHg
Observed at
TWF, 13 nm away

Docket · 1

The files NTSB released with the investigation on September 28, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 542 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 N7502Y · 1

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