Individually Owned: 150,657
Corporate Owned: 137,281
N/A Airport
Aircraft Accident/Incident Report
Boulder, Colorado 80301
Wednesday, November 27, 2013 11:50 CDT
NTSB Narrative Summary Released at Completion of Accident
On November 27, 2013, about 1150 central daylight time, an experimental homebuilt airplane, N3786A, registered to the pilot, was destroyed when it impacted terrain after an in-flight separation of it's wing while maneuvering over a rural area near Boulder, Colorado. The private pilot, who was the sole occupant, sustained fatal injuries. The personal flight was being conducted under the provisions of Code of Federal Regulations Part 91. Visual meteorological conditions prevailed throughout the area and a flight plan was not filed. The flight originated about 1130 from the Rocky Mountain Metropolitan Airport (BJC), and it's intended destination was Loveland, Colorado.
During examination on site, the airplane's fuselage was found in a creek bed. The left wing of the airplane was located about 1/3 of a mile from the main wreckage. The wreckage was recovered to a secure facility in Greeley, Colorado for further examination.
Radar data showed a normal departure and climbout from Rocky Mountain Airport during the first 15 minutes of flight, until a sudden turn and rapid descent. A witness in the area reported that he heard a loud sound, looked up, and saw the airplane falling out of the sky. No radio calls or distress transmissions were reported from the pilot.
NTSB Probable Cause Narrative
Not Yet Reported
Event Information
| Type of Event | Accident |
| Event Date | 11/27/2013 |
| Event Day of the Week | Wednesday |
| Time of Event | 1150 |
| Event Time Zone | Central Daylight Time |
| Event City | Boulder |
| Event State | COLORADO |
| Event Country | -- |
| Zipcode of the event site | 80301 |
| Event Date Year | 2013 |
| Event Date Month | 11 |
| MidAir Collision Indicator | No |
| On Ground Collision occurred ? | No |
| Event Location Latitude | 400260N |
| Event Location Longitude | 1050560E |
| Event Location Airport | N/A |
| Event Location Nearest Airport ID | -- |
| Indicates whether the acc/inc occurred off or on an airport | Off Airport/Airstrip |
| Distance from airport in statute miles | -- |
| Degrees magnetic from airport | -- |
| Airport Elevation | -- |
| Weather Briefing Completeness | -- |
| Investigator's weather source | Weather Observation Facility |
| Time of the weather observation | 1059 Central Daylight Time |
| Direction of event from weather observation facility (degrees) | -- |
| Weather Observation Facility ID | BDU |
| Elevation of weather observation facility | 5600 |
| Distance of event from weather observation facility (units?) | 25 |
| 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) | 14 |
| Dew Point at event time (in degress fahrenheit) | 2 |
| Wind Direction (degrees magnetic) | -- |
| Variable Wind Indicator | -- |
| Wind Speed (knots) | -- |
| Wind Velocity Indicator | Calm |
| Wind Gust Indicator | -- |
| Wind Gust (knots) | -- |
| Altimeter Setting at event time (in. Hg) | 30.04 |
| 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 | 1 |
| Injury Total Minor | -- |
| Injury Total None | -- |
| Injury Total Serious | -- |
| Injury Total All | 1 |
| Investigating Agency | NTSB |
| NTSB Docket Number (internal use) | -- |
| NTSB Notification Source | FAA 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 | May 7 2014 12:00AM |
| User who most recently changed record | lema |
| Basic weather conditions | Visual Meteorological Cond |
| FAA District Office | -- |
Aircraft Involved |
|
|---|---|
Aircraft #1 |
|
| Aircraft Registration Number | N3786A |
| NTSB Number | CEN14FA072 |
| Missing Aircraft Indicator | -- |
| Federal Aviation Reg. Part | Part 91: General Aviation |
| Type of Flight Plan filed | None |
| Flight plan Was Activated? | No |
| Damage | Destroyed |
| Aircraft Fire | None |
| Aircraft Explosion | None |
| Aircraft Manufacturer's Full Name | BIESEMEIER DAVID I |
| Aircraft Model | SMYTH SIDEWINDER |
| Aircraft Series Identifier | -- |
| Aircraft Serial Number | 212581 |
| Certified Max Gross Weight | 1600 |
| Aircraft Category | Airplane |
| Aircraft Registration Class | -- |
| Aircraft is a homebuilt? | Yes |
| Flight Crew Seats | 1 |
| Cabin Crew Seats | 0 |
| Passenger Seats | 0 |
| Total number of seats on the aircraft | 1 |
| Number of Engines | 1 |
| Fixed gear or retractable gear | Fixed |
| Aircraft, Type of Last Inspection | Continuous Airworthiness |
| Date of Last Inspection | May 24 2013 12:00AM |
| Airframe hours since last inspection | -- |
| Airframe Hours | 1909 |
| ELT Installed | No |
| ELT Activated | Unknown |
| ELT Aided Location of Event Site | Unknown |
| ELT Type | -- |
| Aircraft Owner Name | BIESEMEIER DAVID I |
| Aircraft Owner Street Address | 1637 PERSIAN AVE |
| Aircraft Owner City | LOVELAND |
| Aircraft Owner State | CO |
| Aircraft Owner Country | USA |
| Aircraft Owner Zipcode | 805373734 |
| Operator is an individual? | Yes |
| Operator Name | BIESEMEIER DAVID I |
| Operator Same as Owner? | Yes |
| Operator Is Doing Business As | -- |
| Operator Address Same as Owner? | Yes |
| Operator Street Address | 1637 PERSIAN AVE |
| Operator City | LOVELAND |
| Operator State | CO |
| Operator Country | USA |
| Operator Zip code | 805373734 |
| 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 | No |
| Departure Airport Code | BJC |
| Departure City | Broomfield |
| Departure State | CO |
| Departure Country | USA |
| Departure Time | 1130 |
| Departure Time Zone | CDT |
| Destination Same as Local Flt | -- |
| Destination Airport Code | FNL |
| Destination City | Loveland |
| Destination State | CO |
| Destination Country | USA |
| Specific Phase of Flight | -- |
| Report sent to ICAO? | -- |
| Evacuation occurred | -- |
| Date of most recent change to record | May 7 2014 12:33AM |
| User who most recently changed record | lema |
| Since inspection or accident | Last Inspection |
| Event Location Runway Number and Location | N/A |
| Runway Length | -- |
| Runway Width | -- |
| Sight Seeing flight | No |
| Air Medical Flight | No |
| Medical Flight | -- |