Aircraft Accident/Incident Report

Butte City, California 95920
Wednesday, May 15, 2013 19:00 PDT

NTSB Narrative Summary Released at Completion of Accident

The pilot reported that he was at a low altitude and in a turn for the next agricultural aerial application run when the airplane encountered its wake turbulence, and the inside wing stalled. He tried to apply rudder to recover, but the airplane inverted and pitched nosedown before it impacted terrain. The pilot reported no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation. The pilot awoke at 0445 on the day of the accident. He had been awake for over 15 hours and had flown 71 application loads during 12 of those hours at the time of the accident. Due to the early wake time and high work load, the pilot was most likely fatigued at the time of the accident.

NTSB Probable Cause Narrative

The pilot's failure to maintain airplane control after an encounter with wake turbulence while maneuvering at low altitude. Contributing to the accident was the pilot’s fatigue due to extended hours of wakefulness and high workload.

Event Information

Type of Event Accident
Event Date 5/15/2013
Event Day of the Week Wednesday
Time of Event 1900
Event Time Zone Pacific Daylight Time
Event City Butte City
Event State CALIFORNIA
Event Country --
Zipcode of the event site 95920
Event Date Year 2013
Event Date Month 5
MidAir Collision Indicator No
On Ground Collision occurred ? No
Event Location Latitude 415314N
Event Location Longitude 1215832W
Event Location Airport --
Event Location Nearest Airport ID --
Indicates whether the acc/inc occurred off or on an airport Off Airport/Airstrip
Distance from airport in statute miles --
Degrees magnetic from airport --
Airport Elevation --
Weather Briefing Completeness --
Investigator's weather source Weather Observation Facility
Time of the weather observation 1853 Pacific Daylight Time
Direction of event from weather observation facility (degrees) --
Weather Observation Facility ID KOVE
Elevation of weather observation facility --
Distance of event from weather observation facility (units?) --
Time Zone of the weather observation PDT
Lighting Conditions Day
Lowest Ceiling Height --
Lowest Non-Ceiling Height --
Sky/Lowest/Cloud Conditions Clear
Sky Condition for Lowest Ceiling None
Visibility Runway Visual Range (Feet) --
Visibility Runway Visual Value (Statute Miles) --
Visibility (Statute Miles) 10
Air Temperature at event time (in degrees celsius) 26
Dew Point at event time (in degress fahrenheit) 11
Wind Direction (degrees magnetic) 140
Variable Wind Indicator Wind direction could be determined
Wind Speed (knots) 7
Wind Velocity Indicator --
Wind Gust Indicator Not Gusting
Wind Gust (knots) --
Altimeter Setting at event time (in. Hg) 29.91
Density Altitude (feet) --
Intensity of Precipitation --
METAR weather report --
Event Highest Injury Minor
On Ground, Fatal Injuries --
On Ground, Minor Injuries --
On Ground, Serious Injuries --
Injury Total Fatal --
Injury Total Minor 1
Injury Total None --
Injury Total Serious --
Injury Total All 1
Investigating Agency NTSB
NTSB Docket Number (internal use) 31930
NTSB Notification Source NTSB Comm Center
NTSB Notification Date --
NTSB Notification Time --
Fiche Number and/or location -used to find docket information --
Date of most recent change to record Sep 10 2013 11:44AM
User who most recently changed record coos
Basic weather conditions Visual Meteorological Cond
FAA District Office --

Aircraft Involved

Aircraft #1

Aircraft Registration Number N83110
NTSB Number WPR13LA233
Missing Aircraft Indicator --
Federal Aviation Reg. Part Part 137: Agricultural
Type of Flight Plan filed None
Flight plan Was Activated? --
Damage Substantial
Aircraft Fire None
Aircraft Explosion None
Aircraft Manufacturer's Full Name SCHWEIZER AIRCRAFT CORP
Aircraft Model G-164D
Aircraft Series Identifier --
Aircraft Serial Number 110
Certified Max Gross Weight 8000
Aircraft Category Airplane
Aircraft Registration Class --
Aircraft is a homebuilt? No
Flight Crew Seats --
Cabin Crew Seats --
Passenger Seats --
Total number of seats on the aircraft 1
Number of Engines 1
Fixed gear or retractable gear Fixed
Aircraft, Type of Last Inspection 100 Hour
Date of Last Inspection --
Airframe hours since last inspection --
Airframe Hours --
ELT Installed No
ELT Activated No
ELT Aided Location of Event Site No
ELT Type --
Aircraft Owner Name JONES Flying Service, Inc
Aircraft Owner Street Address --
Aircraft Owner City BIGGS
Aircraft Owner State CA
Aircraft Owner Country USA
Aircraft Owner Zipcode 95917-0497
Operator is an individual? No
Operator Name JONES Flying Service, Inc
Operator Same as Owner? Yes
Operator Is Doing Business As --
Operator Address Same as Owner? Yes
Operator Street Address --
Operator City BIGGS
Operator State CA
Operator Country USA
Operator Zip code 95917-0497
Operator Code --
Owner has at least one certificate Yes - certificate holder
Other Operator of large aircraft? No
Certified for Part 133 or 137 Operation Agriculture
Operator Certificate Number --
Indicates whether an air carrier operation was scheduled or not --
Indicates Domestic or International Flight --
Operator carrying Pax/Cargo/Mail --
Type of Flying (Per_Bus / Primary) Aerial Application
Second Pilot on Board No
Departure Point Same as Event No
Departure Airport Code --
Departure City Biggs
Departure State CA
Departure Country USA
Departure Time 1855
Departure Time Zone PDT
Destination Same as Local Flt dest & departure same, accident can occur anywhere
Destination Airport Code --
Destination City Biggs
Destination State CA
Destination Country USA
Specific Phase of Flight --
Report sent to ICAO? --
Evacuation occurred --
Date of most recent change to record Sep 10 2013 11:44AM
User who most recently changed record coos
Since inspection or accident --
Event Location Runway Number and Location N/A
Runway Length --
Runway Width --
Sight Seeing flight No
Air Medical Flight No
Medical Flight --