# Accident 20250911018379A: Diamond Aircraft Ind Inc DA 40, Rocky Ridge, UT, September 11, 2025

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: September 11, 2025, 21:30 local time
- Place: Rocky Ridge, UT
- Damage: Substantial damage
- Phase of flight: Maneuver
- Operating rules: General operating rules (Part 91)
- Location: 39.9174° N, 111.8607° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=39.9174&lon=-111.8607&mi=10
- Aircraft: N8VT, registered now (https://openairdocs.org/aircraft/N8VT) (OpenAirDocs)
- Registry model: Diamond Aircraft Ind DA 40 (registry code 2990002, https://openairdocs.org/model/diamond-aircraft-ind-da-40) (OpenAirDocs)
- Registry engine: Lycoming I0360 series (registry code 41515, https://openairdocs.org/engine/lycoming-i0360-series) (OpenAirDocs)
- Reported make and model: DIAMOND AIRCRAFT IND INC DA 40
- Reported engine: LYCOMING I0360 SER
- People aboard: 3
- Fatal injuries: 0
- Other injuries: 3
- Pilot certificates: Commercial pilot, flight instructor, private pilot
- Pilot flight hours: 1,514 total, 86 in this make and model, 163 in the last 90 days
- NTSB investigation: [NTSB WPR25LA278](https://openairdocs.org/ntsb/WPR25LA278) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20250911018379A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

THE INSTRUCTIONAL FLIGHT WITH FLIGHT INSTRUCTOR, STUDENT PILOT AND PASSENGER BEGAN WITH GROUND INSTRUCTION AND THEN DEPARTED WEST DESERT AIRPORT AT APPROXIMATELY 2030 MDT. THE STUDENT AND INSTRUCTOR PERFORMED ONE STOP AND GO AT THE PROVO, UT AIRPORT BEFORE CONTINUING TO SPANISH FORK. THEY PERFORMED 4 STOP AND GOS AND DECIDED TO NAVIGATE TO NEPHI AIRPORT FOR ONE MORE STOP AND GO. EN ROUTE TO NEPHI THE INSTRUCTOR TOOK THE CONTROLS FROM THE STUDENT AND CONDUCTED VARIOUS MANUEVERS, THEN PROCEEDED TO GIVE CONTROLS BACK TO THE STUDENT AND HAD THEM RECOVER. IN SHORT TIME AFTER THE STUDENT RECEIVED THE CONTROLS FROM THE INSTRUCTOR, THE AIRCRAFT IMPACTED ELEVATED MOUNTAINOUS TERRAIN NORTH OF MONA RESERVOIR.

## The NTSB's investigation of this event (1)

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.

- [NTSB WPR25LA278](https://openairdocs.org/ntsb/WPR25LA278), Sep 12, 2025: Diamond Aircraft Ind DA 40 (N8VT), Rocky Ridge, UT, substantial damage. Probable cause: The flight instructor’s inadequate supervision and delayed remedial action during an unusual attitude recovery, which resulted in a descent into terrain.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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