ASN Wikibase Occurrence # 214557
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| Date: | Monday 20 August 2018 |
| Time: | 06:45 |
| Type: |  Stolp SA-750 Acroduster Too |
| Owner/operator: | Private |
| Registration: | N787WM |
| MSN: | SA750-083176JC |
| Year of manufacture: | 1993 |
| Total airframe hrs: | 470 hours |
| Engine model: | Lycoming AEIO-360 SER |
| Fatalities: | Fatalities: 2 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | South of Phoenix-Deer Valley Airport (KDVT), Phoenix, AZ -
 United States of America
|
| Phase: | Landing |
| Nature: | Private |
| Departure airport: | Phoenix-Deer Valley Airport, AZ (DVT/KDVT) |
| Phoenix-Deer Valley Airport, AZ (DVT/KDVT) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The two private pilots on board the experimental amateur-built airplane had purchased the airplane 2 days before the accident. On the day of the sale, the previous owner provided the rear-seat accident pilot with a 2.5-hour familiarization flight. He stated that he had no issues with the pilot's performance, but he did suggest that the accident pilot obtain some instruction from a flight instructor to become more familiar with the airplane, to which the accident pilot replied that he didn't have time and that he felt comfortable with the airplane.
On the morning of the accident, the pilots performed 4 takeoffs and landings in the airport traffic pattern, each of which was uneventful. During the 5th circuit in the traffic pattern, onboard video revealed that the airplane's nose pitched up slightly just before the airplane entered the left turn onto the base leg. As the airplane continued to turn left, it appeared to exhibit aerodynamic buffeting. The airplane rolled right, then immediately rolled left as the nose pitched down and the airplane began to rapidly descend. The airplane rolled from a 90° left bank to a 90° right bank and continued to descend in a nose-low attitude while rolling left and right before impacting terrain. Postaccident examination of the airplane and engine revealed no anomalies that would have precluded normal operation.
It could not be determined which of the two pilots was manipulating the flight controls at the time of the accident, and no personal logbooks for either pilot were available for review; therefore, the pilots' flight experience and recency of experience could not be determined. The onboard video of the flight was consistent with an exceedance of the airplane's critical angle of attack while maneuvering in the airport traffic pattern, which resulted in an aerodynamic stall/spin at an altitude too low for recovery.
Probable Cause: An exceedance of the airplane's critical angle of attack while maneuvering for landing, which resulted in an aerodynamic stall/spin at an altitude too low for recovery.
Accident investigation:
 |
|
Sources:
NTSB
Location
Images:
Photo: NTSB
Media:
Deer Valley, AZ, USA - 1 dead in plane crash near Deer Valley Airport.https://t.co/z7ZV9cvBGX pic.twitter.com/vAOfEXhXxn
— Planes Of Legend (@PlanesOfLegend) 20 août 2018
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Aug-2018 15:01 | Geno | Added |
| 20-Aug-2018 15:18 | Iceman 29 | Updated [Time, Aircraft type, Registration, Cn, Operator, Source, Narrative] |
| 20-Aug-2018 15:22 | Iceman 29 | Updated [Aircraft type, Embed code] |
| 20-Aug-2018 15:23 | Iceman 29 | Updated [Source, Embed code] |
| 20-Aug-2018 16:41 | Iceman 29 | Updated [Photo, ] |
| 20-Aug-2018 16:51 | Geno | Updated [Registration, Source, Narrative] |
| 20-Aug-2018 17:31 | Iceman 29 | Updated [Source] |
| 20-Aug-2018 18:08 | Iceman 29 | Updated [Embed code] |
| 20-Aug-2018 19:01 | Iceman 29 | Updated [Embed code] |
| 20-Aug-2018 19:02 | Iceman 29 | Updated [Embed code] |
| 21-Aug-2018 05:29 | Anon. | Updated [Total fatalities, Narrative] |
| 21-Aug-2018 09:27 | Iceman 29 | Updated [Nature, Embed code] |
| 08-Jun-2020 08:37 | ASN Update Bot | Updated [Time, Departure airport, Destination airport, Source, Embed code, Damage, Narrative, Accident report, ] |
| 08-Jun-2020 09:32 | harro | Updated [Departure airport, Destination airport, Source, Embed code, Narrative, Photo, Accident report, ] |
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