Individually Owned: 150,657
Corporate Owned: 137,281
Sonoma Skypark Airport
Aircraft Accident/Incident Report
Sonoma, California 95476
Saturday, November 6, 2010 12:30 PDT
NTSB Narrative Summary Released at Completion of Accident
The pilot reported that after takeoff it felt as if the airplane was in a strong downdraft or strong tailwind gust and that "somehow there was not enough power.” When the airplane reached about 100 to 150 feet above ground level, it veered right, rapidly descended, and collided with a warehouse. A witness reported that he heard the engine running but that it was only producing partial power. During the postaccident examination of the engine, the engine started without hesitation and ran smoothly during a test run. Although the reported weather conditions were conducive to serious carburetor icing at cruise power, it could not be determined if carburetor icing was the reason for the partial loss of engine power. Further, weather conditions were not conducive to strong wind.
NTSB Probable Cause Narrative
A partial loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.
Event Information
| Type of Event | Accident |
| Event Date | 11/6/2010 |
| Event Day of the Week | Saturday |
| Time of Event | 1230 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Sonoma |
| Event State | CALIFORNIA |
| Event Country | -- |
| Zipcode of the event site | 95476 |
| Event Date Year | 2010 |
| Event Date Month | 11 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 381326N |
| Event Location Longitude | 1222659W |
| Event Location Airport | Sonoma Skypark Airport |
| Event Location Nearest Airport ID | 0Q9 |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 0 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 10 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1154 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 0 |
| Weather Observation Facility ID | 0Q9 |
| Elevation of weather observation facility | 20 |
| Distance of event from weather observation facility (units?) | 0 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 1300 |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | Overcast |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 15 |
| Dew Point at event time (in degress fahrenheit) | 11 |
| Wind Direction (degrees magnetic) | 250 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 4 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 29.99 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Serious |
| 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 | 1 |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 30350 |
| NTSB Notification Source | FAA AWP Operations Center |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Aug 1 2012 2:21PM |
| User who most recently changed record | coos |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N3215S |
| NTSB Number | WPR11LA039 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Substantial |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | Lansdorf |
| Aircraft Model | Qualt |
| Aircraft Series Identifier | 200 |
| Aircraft Serial Number | ROK 1998 |
| Certified Max Gross Weight | 992 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | -- |
| Cabin Crew Seats | -- |
| Passenger Seats | -- |
| Total number of seats on the aircraft | -- |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | Mar 26 2010 12:00AM |
| Airframe hours since last inspection | 20 |
| Airframe Hours | 405 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | Unknown |
| Aircraft Owner Name | Paul Lansdorf |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | San Francisco |
| Aircraft Owner State | CA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 94110 |
| Operator is an individual? | Yes |
| Operator Name | Paul Lansdorf |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | San Francisco |
| Operator State | CA |
| Operator Country | USA |
| Operator Zip code | 94110 |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | No |
| Certified for Part 133 or 137 Operation | -- |
| 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) | Personal |
| Second Pilot on Board | No |
| Departure Point Same as Event | Yes |
| Departure Airport Code | 0Q9 |
| Departure City | Sonoma |
| Departure State | CA |
| Departure Country | USA |
| Departure Time | 1230 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | O69 |
| Destination City | Petaluma |
| Destination State | CA |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Aug 1 2012 2:25PM |
| User who most recently changed record | coos |
| Since inspection or accident | Time of Accident |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |