# NTSB WPR26LA235: Diamond Aircraft Ind DA20-C1, N643DC, Nephi, UT, June 25, 2026

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Class 3 · Limited · Preliminary report
- Date: June 25, 2026, 09:05 local (15:05 UTC)
- Place: Nephi, UT
- Coordinates: 39.66479, -112.00683 (estimated)
- Nearby events: https://openairdocs.org/map.md?lat=39.6648&lon=-112.0068&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Defining event: [Enroute: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Investigation ongoing
- Investigation class: Class 3
- NTSB office: Western Pacific Region
- Parties: FAA
- NTSB case key (mKey): 203265
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=WPR26LA235
- NTSB preliminary report (PDF, downloads): https://data.ntsb.gov/carol-repgen/api/Aviation/ReportMain/GenerateNewestReport/203265/pdf
- Page: https://openairdocs.org/ntsb/WPR26LA235

## Preliminary report

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.

## Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event best describes what happened.

- [Enroute: Loss of engine power (total)](https://openairdocs.org/ntsb-events/341) (defining event); cases with it: [Diamond Aircraft Ind DA20-C1, 12 cases](https://openairdocs.org/ntsb-events/341/sequence.md?model=2990001), [All aircraft, 3,820 cases](https://openairdocs.org/ntsb-events/341/sequence.md)

## Aircraft

- Registration: [N643DC](https://openairdocs.org/aircraft/N643DC), registered now, S/N C0143, built 2001 (OpenAirDocs)
- Reported make and model: DIAMOND AIRCRAFT IND INC DA20-C1
- Registry model: [Diamond Aircraft Ind DA20-C1](https://openairdocs.org/model/diamond-aircraft-ind-da20-c1) (registry code 2990001) (OpenAirDocs)
- Registry engine: [Continental IO-240 series](https://openairdocs.org/engine/continental-io-240-series) (registry code 17063, reciprocating) (OpenAirDocs)
- Category: Airplane
- Serial number: C0143
- Year built: 2001
- Airframe hours: 3984.1
- Damage: Substantial damage
- Flight: Instructional, Part 91
- Operator: FLT Academy, doing business as FLT Academy
- Registered owner: Skywest Leasing Inc
- Airworthiness certificate: Standard, Normal
- Last inspection: 100 hour, May 27, 2026
- Departed: DTA, Delta, UT
- Destination: SPK, Spanish Fork, UT
- Airport: Fiel, None
- Equipment: Data recorder, ADS-B, Stall warning system, Onboard weather, Electronic primary flight display, Electronic multifunction display

## Weather

- Wind: 150° at 11 knots
- Visibility: 10 statute miles
- Lowest ceiling: none
- Temperature: 73 °F, dew point 54 °F
- Altimeter: 30.03 inHg
- Observed at: KSPK
- METAR: METAR KSPK 251535Z AUTO 15011KT 10SM CLR 23/12 A3003 RMK AO2 LTG DSNT N=

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

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