Saturday, May 11, 2019

Loss of Control on Ground: Moravan Zlin Z-143L, N143GW, accident occurred December 10, 2018 at Chester Airport (KSNC) Middlesex County, Connecticut

Additional Participating Entity:
Federal Aviation Administration / Flight Standards District Office; Enfield, Connecticut

Aviation Accident Final Report - National Transportation Safety Board:

Investigation Docket - National Transportation Safety Board:

Location: Chester, CT
Accident Number: GAA19CA091
Date & Time: 12/10/2018, 1045 EST
Registration: N143GW
Aircraft: Zlin Z143
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 initial engine start, he "cranked the engine several times," but the engine would not start. He then pumped the throttle about six times, and in a "split second," the engine surged to full rpm. He added that, despite fully applying the brakes, the airplane crossed over a ridge and went down an embankment. Subsequently, the airplane entered a parking lot, the left wing struck a lamp post, the airplane spun left, and it impacted another lamp post.

The airplane sustained substantial damage to both wings, the fuselage, and the empennage.

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

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's loss of airplane control during the engine start.


Personnel issues
Aircraft control - Pilot (Cause)

Environmental issues
Pole - Effect on operation
Sloped/uneven terrain - Contributed to outcome

Factual Information

History of Flight

Taxi-to runway

Standing-engine(s) start-up
Loss of control on ground (Defining event)

Taxi-to runway
Collision with terr/obj (non-CFIT)

Pilot Information

Certificate: Private
Age: 78, Male
Airplane Rating(s): Single-engine Land
Seat Occupied: Front
Other Aircraft Rating(s): None
Restraint Used: 4-point
Instrument Rating(s): None
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 Without Waivers/Limitations
Last FAA Medical Exam: 05/13/2018
Occupational Pilot: No
Last Flight Review or Equivalent: 10/09/2018
Flight Time:  (Estimated) 1099 hours (Total, all aircraft), 27 hours (Total, this make and model), 822 hours (Pilot In Command, all aircraft), 15 hours (Last 90 days, all aircraft), 1 hours (Last 30 days, all aircraft)

Aircraft and Owner/Operator Information

Aircraft Make: Zlin
Registration: N143GW
Model/Series: Z143 L
Aircraft Category: Airplane
Year of Manufacture: 2001
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 0039
Landing Gear Type: Tricycle
Seats: 4
Date/Type of Last Inspection: 03/07/2018, Annual
Certified Max Gross Wt.: 2970 lbs
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 977 Hours at time of accident
Engine Manufacturer: Lycoming
ELT: C91  installed, not activated
Engine Model/Series: O-540-J3A5
Registered Owner: On file
Rated Power: 235 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: KSNC, 417 ft msl
Distance from Accident Site: 0 Nautical Miles
Observation Time: 1055 UTC
Direction from Accident Site: 305°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: 5 knots /
Turbulence Type Forecast/Actual: None / None
Wind Direction: 350°
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 30.06 inches Hg
Temperature/Dew Point: -4°C / -9°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Chester, CT (SNC)
Type of Flight Plan Filed: Unknown
Destination: Fishers Island, NY (0B8)
Type of Clearance: None
Departure Time:  EST
Type of Airspace: Class G

Airport Information

Airport: CHESTER (SNC)
Runway Surface Type: Asphalt
Airport Elevation: 416 ft
Runway Surface Condition: Dry
Runway Used: N/A
IFR Approach: None
Runway Length/Width:
VFR Approach/Landing: None 

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: 41.383333, -72.504722 (est)

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