# Accident 20260605005239A: Olson/Williams SONEX, Jaffrey, NH, June 5, 2026

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: June 5, 2026, 16:26 local time
- Place: Jaffrey, NH
- Airport: Silver Ranch Airpark Inc
- Damage: Substantial damage
- Phase of flight: Takeoff: Climb Out
- Operating rules: General operating rules (Part 91)
- Location: 42.8196° N, 72.0577° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=42.8196&lon=-72.0577&mi=10
- Aircraft: N28YD, registered now (https://openairdocs.org/aircraft/N28YD) (OpenAirDocs)
- Registry model: Olson/Williams SONEX (registry code 059010N, https://openairdocs.org/model/olson-williams-sonex) (OpenAirDocs)
- Registry engine: Amateur-built UNKNOWN ENG (registry code 99999, https://openairdocs.org/engine/amateur-built-unknown-eng) (OpenAirDocs)
- Reported make and model: OLSON/WILLIAMS SONEX
- Reported engine: AMA/EXPR VOLKSWAGEN
- People aboard: 1
- Fatal injuries: 0
- Other injuries: 1
- Pilot certificates: Private pilot
- NTSB investigation: [NTSB ERA26LA231](https://openairdocs.org/ntsb/ERA26LA231) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20260605005239A

## Narrative

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

ON JUNE 5, 2026 AT APPROXIMATELY 1638Z THE AIRCRAFT CRASHED SHORTLY AFTER TAKEOFF DUE TO A LOSS OF POWER AND POSSIBLE STALL. THE PILOT WAS INJURED AND EVACUATED TO UMASS HOSPITAL. THE AIRCRAFT WAS SUBSTANTIALLY DAMAGED. IT APPEARS TO HAVE IMPACTED ON THE LEFT WING TIP AND LEFT FORWARD ENGINE COWL AREA. EXAMINATION OF THE WRECKAGE SHOWED FLIGHT CONTROL CONTINUITY AND FUEL SYSTEM CONTINUITY TO THE THROTTLE BODY. THE ELECTRICAL SYSTEM COULD NOT BE CHECKED DUE TO IMPACT DAMAGE TO THE UPPER MAGNETO. CRANKSHAFT CONTINUITY WAS ESTABLISHED BY TURNING THE DAMAGED PROPELLER AND OBSERVING MOVEMENT OF THE FLYWHEEL ON THE AFT SIDE OF THE ENGINE. ENGINE COMPRESSION WAS ESTABLISHED BY REMOVING A SPARK PLUG IN EACH CYLINDER AND ROTATING THE DAMAGED PROPELLER. TWO INSTRUMENTS WITH NON-VOLATILE MEMORY WERE REMOVED FROM THE INSTRUMENT PANEL ALONG WITH AN SD CARD AND PROVIDED TO THE NTSB FOR EXAMINATION. AIRCRAFT LOGBOOKS ARE NOT ACCESSABLE AT THIS TIME. THIS IS AN INTERIM REPORT. WE ARE AWAITING RESULTS FROM THE INSTRUMENT DOWNLOAD AND REVIEW OF THE AIRCRAFT LOGBOOKS AND WILL UPDATE AT THAT TIME.

## 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 ERA26LA231](https://openairdocs.org/ntsb/ERA26LA231), Jun 5, 2026: Olson/Williams Sonex (N28YD), Jaffrey, NH, substantial damage, investigation ongoing

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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