Sunday, May 02, 2021

Landing Area Overshoot: Stemme S10, N2280X; accident occurred May 03, 2019 at Sonoma Skypark Airport (0Q9), Schellville, California

View of fuselage damage 

View of right wing damage 

Aviation Accident Final Report - National Transportation Safety Board

Additional Participating Entity: 
Federal Aviation Administration / Flight Standards District Office; Oakland, California

Investigation Docket - National Transportation Safety Board:

Location: Sonoma, CA
Accident Number: GAA19CA241
Date & Time: 05/03/2019, 1315 PDT
Registration: N2280X
Aircraft: Stemme S 10
Aircraft Damage: Substantial
Defining Event: Landing area overshoot
Injuries: 1 Minor
Flight Conducted Under: Part 91: General Aviation - Personal 


The pilot of the powered glider reported that, while on final, he saw that the ground speed was higher than the indicated airspeed. Upon landing, the powered glider veered left, and he corrected with left brake and rudder. The powered glider then overran the runway and impacted a tree.

The powered glider sustained substantial damage to the fuselage and left wing.

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

The pilot reported that, after the accident, he was told the airplane touched down beyond halfway down the runway, and he recommended not landing with a tailwind.

Probable Cause and Findings

The National Transportation Safety Board determines the probable cause(s) of this accident to be:
The pilot's improper decision to land with a tailwind and his failure to maintain a proper approach, which resulted in a long landing, a runway overrun, and impact with a tree.


Descent/approach/glide path - Not attained/maintained (Cause)
Landing distance - Not attained/maintained (Cause)

Personnel issues
Aircraft control - Pilot (Cause)
Decision making/judgment - Pilot (Cause)

Environmental issues
Tailwind - Decision related to condition (Cause)
Tailwind - Effect on operation (Cause)
Tree(s) - Effect on operation (Cause)

Factual Information

History of Flight

Landing area overshoot (Defining event)
Loss of control on ground
Attempted remediation/recovery
Runway excursion
Collision with terr/obj (non-CFIT)

Pilot Information

Certificate: Commercial; Private
Age: 82, Male
Airplane Rating(s): Single-engine Land; Single-engine Sea
Seat Occupied: Left
Other Aircraft Rating(s): Glider
Restraint Used: Unknown
Instrument Rating(s): Airplane
Second Pilot Present: No
Instructor Rating(s): None
Toxicology Performed: No
Medical Certification: Class 3 With Waivers/Limitations
Last FAA Medical Exam: 05/29/2013
Occupational Pilot: No
Last Flight Review or Equivalent: 09/16/2017
Flight Time:  (Estimated) 2500 hours (Total, all aircraft), 100 hours (Total, this make and model)

Aircraft and Owner/Operator Information

Aircraft Make: Stemme
Registration: N2280X
Model/Series: S 10 Undesignated
Aircraft Category: Glider
Year of Manufacture: 1991
Amateur Built: No
Airworthiness Certificate: Normal
Serial Number: 10-27
Landing Gear Type: Retractable - Tailwheel
Seats: 2
Date/Type of Last Inspection: 11/12/2018, Annual
Certified Max Gross Wt.:
Time Since Last Inspection:
Engines: 1 Reciprocating
Airframe Total Time: 321 Hours at time of accident
Engine Manufacturer: AMA/EXPR
ELT: Not installed
Engine Model/Series: 
Registered Owner: On file
Rated Power: 
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: KDVO, 4 ft msl
Distance from Accident Site: 8 Nautical Miles
Observation Time: 2015 UTC
Direction from Accident Site: 220°
Lowest Cloud Condition: Clear
Visibility:  10 Miles
Lowest Ceiling: None
Visibility (RVR):
Wind Speed/Gusts: Light and Variable /
Turbulence Type Forecast/Actual: None / None
Wind Direction: Variable
Turbulence Severity Forecast/Actual: N/A / N/A
Altimeter Setting: 29.97 inches Hg
Temperature/Dew Point: 22°C / 11°C
Precipitation and Obscuration: No Obscuration; No Precipitation
Departure Point: Schellville, CA (0Q3)
Type of Flight Plan Filed: None
Destination: Schellville, CA (0Q3)
Type of Clearance: Unknown
Departure Time: 1215 PDT
Type of Airspace: Class G

Airport Information

Airport: Sonoma Skypark (0Q9)
Runway Surface Type: Asphalt
Airport Elevation: 20 ft
Runway Surface Condition: Dry
Runway Used: 26
IFR Approach: None
Runway Length/Width: 2480 ft / 40 ft
VFR Approach/Landing: Traffic Pattern 

Wreckage and Impact Information

Crew Injuries: 1 Minor
Aircraft Damage: Substantial
Passenger Injuries: N/A
Aircraft Fire: None
Ground Injuries: N/A
Aircraft Explosion: None
Total Injuries: 1 Minor
Latitude, Longitude:  38.257500, -122.434167 (est)

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