Individually Owned: 150,657
Corporate Owned: 137,281
Green Mountain Airport
Aircraft Accident/Incident Report
Vancouver, Washington 98662
Friday, May 2, 2008 16:30 PDT
NTSB Narrative Summary Released at Completion of Accident
Witnesses located near the accident reported seeing the airplane takeoff, make a 180 degree turn, and fly down the runway at an altitude of about 30 feet above ground level (agl). As the airplane crossed the end of the runway, it pitched upwards into a steep climb, and the pilot did an aileron roll to the right, about 200 feet agl. The witness said that at the completion of the roll, the airplane appeared to be in a level attitude when a slight movement was observed, "as if it hit turbulence." The airplane subsequently descended in a nose-low attitude, eventually descending below a tree line. Examination of the airplane revealed no anomalies with the engine or airframe that would have precluded normal operation.
NTSB Probable Cause Narrative
The pilot's failure to maintain an airspeed sufficient to avoid a stall during a low altitude aerobatic maneuver. Contributing to the accident was the low altitude at which the pilot initiated the maneuver.
Event Information
| Type of Event | Accident |
| Event Date | 5/2/2008 |
| Event Day of the Week | Friday |
| Time of Event | 1630 |
| Event Time Zone | Pacific Daylight Time |
| Event City | Vancouver |
| Event State | WASHINGTON |
| Event Country | -- |
| Zipcode of the event site | 98662 |
| Event Date Year | 2008 |
| Event Date Month | 5 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 453947N |
| Event Location Longitude | 1222821W |
| Event Location Airport | Green Mountain |
| Event Location Nearest Airport ID | WA67 |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 1 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 270 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1653 Pacific Daylight Time |
| Direction of event from weather observation facility (degrees) | 200 |
| Weather Observation Facility ID | KPDX |
| Elevation of weather observation facility | 30 |
| Distance of event from weather observation facility (units?) | 7 |
| Time Zone of the weather observation | PDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | 11000 |
| Lowest Non-Ceiling Height | 6000 |
| Sky/Lowest/Cloud Conditions | Few |
| Sky Condition for Lowest Ceiling | Broken |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 20 |
| Dew Point at event time (in degress fahrenheit) | 6 |
| Wind Direction (degrees magnetic) | 100 |
| 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) | 30.05 |
| Density Altitude (feet) | -- |
| Intensity of Precipitation | -- |
| METAR weather report | -- |
| Event Highest Injury | Fatal |
| On Ground, Fatal Injuries | -- |
| On Ground, Minor Injuries | -- |
| On Ground, Serious Injuries | -- |
| Injury Total Fatal | 2 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 2 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 24057 |
| NTSB Notification Source | FAA Operations Center |
| NTSB Notification Date | May 2 2008 12:00AM |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | DMS |
| Date of most recent change to record | Aug 28 2008 3:01PM |
| User who most recently changed record | NTSB\johb |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | Portland, Oregon |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N62813 |
| NTSB Number | SEA08LA120 |
| 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 | Yakovlev |
| Aircraft Model | Yak 52 |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 800608 |
| Certified Max Gross Weight | 2899 |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Retractable |
| Aircraft, Type of Last Inspection | Unknown |
| Date of Last Inspection | -- |
| Airframe hours since last inspection | -- |
| Airframe Hours | -- |
| ELT Installed | -- |
| ELT Activated | -- |
| ELT Aided Location of Event Site | -- |
| ELT Type | -- |
| Aircraft Owner Name | Benjamin James Runyan |
| Aircraft Owner Street Address | -- |
| Aircraft Owner City | Vancouver |
| Aircraft Owner State | WA |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 98682 |
| Operator is an individual? | Yes |
| Operator Name | -- |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | -- |
| Operator City | -- |
| Operator State | -- |
| Operator Country | -- |
| Operator Zip code | -- |
| Operator Code | -- |
| Owner has at least one certificate | None |
| Other Operator of large aircraft? | -- |
| 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 | WA67 |
| Departure City | Vancouver |
| Departure State | WA |
| Departure Country | USA |
| Departure Time | 1625 |
| Departure Time Zone | PDT |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | -- |
| Destination City | -- |
| Destination State | -- |
| Destination Country | -- |
| Specific Phase of Flight | Maneuvering |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Aug 1 2008 5:39PM |
| User who most recently changed record | STAM |
| 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 | -- |