Sunday, July 07, 2019

Loss of Control on Ground: Cessna 170B, N170W, accident occurred June 11, 2018 at Benson Municipal Airport (E95), Cochise County, Arizona

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Scottsdale, Arizona

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Aviation Accident Data Summary - National Transportation Safety Board:

Location: Benson, AZ
Accident Number: GAA18CA339
Date & Time: 06/10/2018, 0945 MST
Registration: N170W
Aircraft: CESSNA 170
Aircraft Damage: Substantial
Defining Event: Loss of control on ground
Injuries: 1 None
Flight Conducted Under: Part 91: General Aviation - Personal


The pilot reported that, during the landing roll, the tailwheel-equipped airplane veered left and began to bounce. He applied right rudder correction, which quickly turned the airplane right toward the centerline, and he then applied left rudder to realign with the runway heading. He increased the engine power setting to full to perform a go-around, but the airplane, during its third bounce, ground looped to the left. The right wing impacted the ground, and the airplane came to rest on its right side with the wing at a 90° angle.

The airplane sustained substantial damage to the right wing.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

The pilot reported that the automated weather observation system located on the airport reported that, about 15 minutes before the accident, the wind was light and variable at 2 knots, gusting to 5 knots. The airplane landed on runway 28. 

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's failure to maintain directional control during landing.


Directional control - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)

Factual Information

History of Flight

Loss of control on ground (Defining event)
Attempted remediation/recovery

Pilot Information

Certificate: Private
Age: 40, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Left
Other Aircraft Rating(s): None
Restraint Used: Unknown
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: BasicMed Without Waivers/Limitations
Last FAA Medical Exam: 10/05/2017
Occupational Pilot: No
Last Flight Review or Equivalent: 05/01/2016
Flight Time:  (Estimated) 137 hours (Total, all aircraft), 7 hours (Total, this make and model), 90 hours (Pilot In Command, all aircraft), 7 hours (Last 90 days, all aircraft), 7 hours (Last 30 days, all aircraft) 

Aircraft and Owner/Operator Information

Aircraft Make: CESSNA
Registration: N170W
Model/Series: 170 B
Aircraft Category: Airplane
Year of Manufacture: 1953
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 25596
Landing Gear Type: Tailwheel
Seats: 4
Date/Type of Last Inspection: 06/04/2018, Annual
Certified Max Gross Wt.: 2200 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 2856.6 Hours as of last inspection
Engine Manufacturer: CONT MOTOR
ELT: C91A installed, not activated
Engine Model/Series: O-300A
Registered Owner: On file
Rated Power: 145 hp
Operator: On file
Operating Certificate(s) Held: None

Meteorological Information and Flight Plan

Conditions at Accident Site: Visual Conditions
Condition of Light: Day
Observation Facility, Elevation: KALK, 4768 ft msl
Distance from Accident Site: 24 Nautical Miles
Observation Time:2056 UTC 
Direction from Accident Site: 189°
Lowest Cloud Condition: Clear
Visibility: 10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 14 knots / 20 knots
Turbulence Type Forecast/Actual: None / None
Wind Direction: 260°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.01 inches Hg
Temperature/Dew Point: 35°C / -22°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Benson, AZ (E95)
Type of Flight Plan Filed: None
Destination: Benson, AZ (E95)
Type of Clearance: None
Departure Time: 0930 MST
Type of Airspace: Class G

Airport Information

Airport: BENSON MUNI (E95)
Runway Surface Type: Asphalt
Airport Elevation: 3830 ft
Runway Surface Condition: Dry
Runway Used: 28
IFR Approach: None
Runway Length/Width: 4002 ft / 75 ft
VFR Approach/Landing: Stop and Go 

Wreckage and Impact Information

Crew Injuries: 1 None
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 None
Latitude, Longitude: 31.999444, -110.358056 (est)

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