WPR10CA410

NTSB accident investigation · Gulfstream-Schweizer A/C Gulfstream AM G-164B · Genesee, ID · August 18, 2010

Accident · No injuriesData collectionFinal report
Date
August 18, 2010, 08:00 local (15:00 UTC)
Place
Genesee, ID
Injuries
1 uninjured
Damage
Substantial damage
Phase of flight
Maneuvering
Aircraft
N8150KGulfstream-Schweizer A/C Gulfstream AM G-164B
Defining event
Maneuvering-low-alt flying: Low altitude operation/event
Weather
Visual (VMC) · Day
Status
Completed · report March 16, 2011
Report
Approved by Office Director
NTSB office
Western Pacific Region
Parties
FAA Spokane FSDO
FAA report
20100818041289A
Case key
77002

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 clearance from terrain during low-altitude maneuvering.

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.

TerrainEnvironmental issues › Physical environment · Response/compensationGulfstream-Schweizer A/C GULFSTREAM AM G-164B: 3 casesAll aircraft: 267 casesProbable cause
Performance/control parameters: altitudeAircraft › Aircraft oper/perf/capability · Not attained/maintainedGulfstream-Schweizer A/C GULFSTREAM AM G-164B: 4 casesAll aircraft: 1,310 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 an aerial application flight he was spraying a mature wheat field along north-facing hillsides. As the pilot finished his last pass, he flew west along the steep hillsides. A strong gust of wind struck the airplane and the left wing dropped into the wheat. Subsequently, the airplane spun and cartwheeled in the wheat field before coming to a rest; the fuselage and empennage were substantially damaged. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident.

Factual narrative

The pilot reported that during an aerial application flight he was spraying a mature wheat field along north facing hillsides. As the pilot finished his last pass he flew west along the steep hillsides. A strong gust of wind struck the airplane and the left wing dropped into the wheat. Subsequently, the airplane spun and cartwheeled in the wheat field before coming to a rest; the fuselage and empennage were substantially damaged. The pilot reported no mechanical failures or malfunctions with the airframe or engine prior to the accident.

Aircraft

Registration
N8150K
Reported as
Gulfstream-Schweizer A/C Gulfstream AM G-164B
Category
Airplane
Serial number
587B
Airframe hours
12,603
Engine
P&W R1340 SERIES, 600 horsepower, reciprocating
Damage
Substantial damage
Flight
Aerial application · Part 137
Operator
Fountain Flying Service LLC
Registered owner
Fountain Flying Service LLC
Airworthiness certificate
Special, Restricted (Special)
Last inspection
Annual · April 14, 2010 · 300 hours before
Departed
PVT · Genesee, ID
Destination
PVT · Genesee, ID

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
40
Injuries
None
Certificate
Commercial
Airplane ratings
Single-engine land
Medical
Class 2, Without waivers/limitations
Last flight review
February 21, 2010
Seat
Single
Flight hours
7,600 total · 3,000 in this make and model · 7,600 as pilot in command · 350 in the last 90 days · 100 in the last 30 days · 0 in the last 24 hours

Weather

Conditions
Visual (VMC) · Day
Wind
180° at 4 knots
Visibility
10 statute miles
Lowest ceiling
None
Temperature
79 °F, dew point 37 °F
Altimeter
29.81 inHg
Observed at
KLWS, 10 nm away

Docket · 1

The files NTSB released with the investigation on October 6, 2010, on NTSB’s docket system: statements, records, photos and specialists’ reports. 483 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 N8150K · 1

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