ASN Wikibase Occurrence # 198513
This record has been locked for editing.
| Date: | Friday 2 September 2016 |
| Time: | 10:00 |
| Type: |  Van's RV-6 |
| Owner/operator: | Private |
| Registration: | N676DT |
| MSN: | 22759 |
| Year of manufacture: | 1996 |
| Total airframe hrs: | 389 hours |
| Engine model: | Lycoming O-360-A1A |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Viborg, SD -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Tea, SD (Y14) |
| Tea, SD (Y14) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The commercial pilot and the passenger, his 14-year-old granddaughter who wanted to become a pilot, were making a local flight in the airplane. No radar or GPS track information was found for the flight. A witness heard the airplane's engine "sputtering" before the airplane impacted the ground in a cornfield. A postimpact fire consumed the engine cowling, cockpit, fuselage, and the forward portion of the empennage. Damage to the airplane, the crop, and marks on the ground indicated that the airplane impacted in a slightly nose-low and left-wing-low attitude with no forward airspeed, consistent with a relatively flat spin. The propeller remained attached to the engine and was embedded in the soil and positioned horizontally. The propeller blades were slightly bent aft and did not exhibit any leading-edge damage, consistent with minimal, if any, power being produced by the engine during impact. No mechanical malfunctions or anomalies were found with the engine or airframe that would have precluded normal operation. However, the examination was limited by the extensive postcrash fire damage. The circumstances of the accident are consistent with the airplane exceeding its critical angle of attack, resulting in an aerodynamic stall and subsequent flat spin into terrain. Given the witness report of a "sputtering" engine and the propeller signatures consistent with the engine not producing power at impact, it is likely that the engine lost power before impact. However, it could not be determined whether the engine lost power before the loss of control or whether the pilot intentionally reduced power during the descent.
The14-year-old passenger was seated in the left seat, and the pilot was seated in the right seat. Although the family reported that the flight was not instructional, it is possible that the pilot allowed the passenger to manipulate the flight controls. Regardless of which occupant was manipulating the flight controls, the pilot was the only certificated pilot on board and was responsible for the safety of the flight.
Probable Cause: The pilot's failure to maintain airplane control, which resulted in the airplane exceeding its critical angle of attack, an aerodynamic stall, and subsequent flat spin into terrain.
Accident investigation:
 |
|
Sources:
NTSB
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 18-Aug-2017 17:25 | ASN Update Bot | Added |
| 19-Aug-2017 16:49 | ASN Update Bot | Updated [Aircraft type, Departure airport, Destination airport, Source, Narrative] |
The Aviation Safety Network is an exclusive service provided by:
Quick Links:
| ASN Home | Send Correction / Feedback |
| FSF Home | Disclaimer | Copyright |
| Contact Us | Privacy Policy |
| Press / Media |
CONNECT WITH US:
©2024 Flight Safety Foundation