Individually Owned: 150,657
Corporate Owned: 137,281
Smith Field Airport
Aircraft Accident/Incident Report
Siloam Springs, Arkansas 72761
Tuesady, November 10, 2009 15:00 CST
NTSB Narrative Summary Released at Completion of Accident
The pilot was performing aerobatics in an experimental airplane when the engine quit. The pilot attempted an emergency landing in a field but hit an unseen power line. The airplane lost control, impacted terrain and cartwheeled, causing substantial damage to the engine compartment, wings, aft fuselage and forward portion of upper cabin area. The pilot and the owner both told investigators that the engine quit due to fuel starvation to the engine caused by a vacuum created in the header tank. Investigators were unable to verify the configuration of the fuel system due to postaccident actions performed by the owner and the lack of information provided by the owner.
NTSB Probable Cause Narrative
A loss of engine power due to fuel starvation for undetermined reasons.
Event Information
| Type of Event | Accident |
| Event Date | 11/10/2009 |
| Event Day of the Week | Tuesday |
| Time of Event | 1500 |
| Event Time Zone | Central Standard Time |
| Event City | Siloam Springs |
| Event State | ARKANSAS |
| Event Country | -- |
| Zipcode of the event site | 72761 |
| Event Date Year | 2009 |
| Event Date Month | 11 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 361131N |
| Event Location Longitude | 0942924W |
| Event Location Airport | Smith Field Airport |
| Event Location Nearest Airport ID | SLG |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | 5 |
| Degrees magnetic from airport | -- |
| Airport Elevation | 1191 |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Pilot |
| Time of the weather observation | |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | SLG |
| Elevation of weather observation facility | -- |
| Distance of event from weather observation facility (units?) | -- |
| Time Zone of the weather observation | CDT |
| Lighting Conditions | Day |
| Lowest Ceiling Height | -- |
| Lowest Non-Ceiling Height | -- |
| Sky/Lowest/Cloud Conditions | Clear |
| Sky Condition for Lowest Ceiling | None |
| Visibility Runway Visual Range (Feet) | -- |
| Visibility Runway Visual Value (Statute Miles) | -- |
| Visibility (Statute Miles) | 10 |
| Air Temperature at event time (in degrees celsius) | 21 |
| Dew Point at event time (in degress fahrenheit) | -- |
| Wind Direction (degrees magnetic) | 180 |
| Variable Wind Indicator | Wind direction could be determined |
| Wind Speed (knots) | 10 |
| Wind Velocity Indicator | -- |
| Wind Gust Indicator | Not Gusting |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | -- |
| 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 | -- |
| Injury Total None | -- |
| Injury Total Serious | 1 |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | 27314 |
| NTSB Notification Source | FAA |
| NTSB Notification Date | -- |
| NTSB Notification Time | -- |
| Fiche Number and/or location -used to find docket information | -- |
| Date of most recent change to record | Aug 16 2010 3:20PM |
| User who most recently changed record | bowl |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N273X |
| NTSB Number | CEN10LA046 |
| 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 | Younkin J R |
| Aircraft Model | Mullicoupe |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 03-1 |
| Certified Max Gross Weight | -- |
| 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 | 2 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Conditional |
| Date of Last Inspection | Mar 10 2009 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 334 |
| ELT Installed | Yes |
| ELT Activated | No |
| ELT Aided Location of Event Site | No |
| ELT Type | -- |
| Aircraft Owner Name | Younkin J R |
| Aircraft Owner Street Address | 1500 S. Old Missouri RD |
| Aircraft Owner City | Springdale |
| Aircraft Owner State | AR |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 72764 |
| Operator is an individual? | Yes |
| Operator Name | Matthew Younkin |
| Operator Same as Owner? | No |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | No |
| Operator Street Address | 606 Carter Rd |
| Operator City | Siloam Springs |
| Operator State | AR |
| Operator Country | USA |
| Operator Zip code | 72761 |
| 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 | SLG |
| Departure City | Siloam Springs |
| Departure State | AR |
| Departure Country | USA |
| Departure Time | 1530 |
| Departure Time Zone | CST |
| Destination Same as Local Flt | dest & departure same, accident can occur anywhere |
| Destination Airport Code | SLG |
| Destination City | Siloam Springs |
| Destination State | AR |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | Oct 6 2010 12:14PM |
| User who most recently changed record | broda |
| 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 | -- |