Diamond Aircraft Ind INC DA20-C1 accident near Nephi, Utah, June 25, 2026
On June 25, 2026 at about 3:05 pm local time, a 2001 Diamond Aircraft Ind INC DA20-C1, registered N643DC, was substantially damaged in an accident during enroute near Nephi, Utah (None airport). It was an instructional flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved.
The NTSB's probable cause their words, unchanged
The NTSB has not yet published a probable cause for this accident. Investigations usually take one to two years; this page updates when the final report is released.
Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- June 25, 2026 · about 3:05 pm local time
- Place
- Nephi, Utah · None · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- not recorded
- Aircraft
- Diamond Aircraft Ind INC DA20-C1, built 2001
- Registration
- N643DC · registry record · serial C0143
- Damage
- Substantial damage
- Flight
- Instructional flight · general aviation rules (Part 91)
The NTSB's narrative preliminary · quoted from the NTSB record
On June 25, 2026, about 0905 mountain daylight time, a Diamond DA20-C1, N643DC, was substantially damaged when it was involved in an accident near Nephi, Utah. The flight instructor and the student pilot were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 141 instructional flight. The flight departed Spanish Fork Airport (SPK), Spanish Fork, Utah, about 0741. According to the flight instructor, during the training flight they elected to perform a simulated engine-out approach to a field. The flight instructor reduced the engine power to simulate the engine failure, and the student maneuvered the airplane toward the selected landing area. As the airplane approached the field, the flight instructor advanced the throttle to full power; however, the engine did not respond. The flight instructor subsequently assumed control of the airplane and performed a forced landing. During the landing rollout, the airplane struck a ditch, which resulted in substantial damage to the right wing and fuselage. The airplane was retained for further examination.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of engine power (total) during enroute defining event
The aircraft
- Airframe total time: 3,984.1 hours
- Last inspection: 100-hour inspection, May 27, 2026
- Maximum gross weight: 1,764 lb
- Seats: 2
- Landing gear: fixed
The flight
- Departed from: DTA Delta UT at 2:49 pm
- Destination: SPK Spanish Fork UT
- Flight plan: none
- A second pilot was aboard
Weather at the time
- Wind: from 150° at 11 knots
- Visibility: 10 statute miles
- Sky: clear
- Temperature: 73°F (23°C), dew point 54°F (12°C)
- Altimeter: 30.03 inHg
- Observation at 8:49 am from KSPK
Weather report (METAR): METAR KSPK 251535Z AUTO 15011KT 10SM CLR 23/12 A3003 RMK AO2 LTG DSNT N=
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
The NTSB has not released the docket for this case yet. The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), is usually released when the investigation is nearly complete, and the list here is refreshed when it appears. Check at the NTSB.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.