ERA26LA231 · Olson/Williams SONEX
Olson/Williams SONEX · Accident: loss of engine power (total) during takeoff
Event
- NTSB case
- ERA26LA231
- Event typeAccident: someone killed or seriously injured, or the aircraft substantially damaged (NTSB definition). Incident: an occurrence that affected or could have affected safety, short of that. Glossary
- Accident
- InvestigationHow far the investigation had got when the record was published: preliminary, ongoing, final or completed. Unknown where the source does not say. Glossary
- Ongoing
- API-reported fatalities
- 0 · all aircraft and ground
- Ground fatalities
- 0
- OperationWhat kind of flying it was, grouped by the rules it flew under: airline (US Part 121), air taxi and commuter (Part 135), general aviation (Part 91 and similar), military or government. Glossary
- General aviation
- WeatherVisual meteorological conditions (VMC): good enough to fly by looking outside. Instrument conditions (IMC): cloud or low visibility, flying by instruments. Glossary
- Visual Meteorological Cond
Olson/Williams SONEX
- Aircraft type
- Olson/williams SONEX
- Category
- Airplane
- RegistrationThe aircraft's tail number, such as N12345 or G-ABCD. Registrations are reissued, so the same one years apart can be a different aircraft. Glossary
- N28YD
- Operator
- Unknown
- Onboard fatalities
- Unknown
- Route
- From not recordedTo not recorded
- Aircraft age
- About 19 years (built 2007)
- Flight rulesThe regulations the flight operated under: in the US, Part 91 (general aviation), Part 121 (airlines), Part 135 (air taxi and commuter) and others; for flights abroad, the NTSB's coarser commercial or non-commercial code. Glossary
- Part 91: General Aviation
- Phase of flightThe stage of the flight when things started to go wrong: standing, taxi, takeoff, initial climb, en route, maneuvering, approach or landing. Glossary
- Takeoff
- Defining eventThe single coded event the NTSB judges best describes what happened (records from 2008 on). Older records name the first occurrence in the sequence instead. Glossary
- Loss of engine power (total)
- DamageDestroyed: beyond practical repair. Substantial: damage that affects the structure, performance or handling and normally needs major repair. Minor: less than that. Glossary
- Substantial
Cause areas
No findings designated as a cause are recorded in the NTSB data yet.
Approximate · Coordinates from the NTSB case API, which marks them as estimated or does not say; no uncertainty radius is established.
NTSB narrative
On June 5, 2026, at 1100 eastern daylight time, an experimental amateur-built Sonex airplane, N28YD, was substantially damaged when it was involved in an accident near Jaffrey, New Hampshire. The private pilot was seriously injured. The flight was conducted as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot, who was also the owner of the airplane said he planned to depart the Jaffrey Airfield Silver Ranch Airport (AFN), Jaffrey, New Hampshire, for a short flight in the local area. After he performed a pre-flight inspection of the airplane, which included checking the fuel for adequate quantity and for contamination, the pilot started the engine and back-taxied to the end of runway 34. Prior to departure, he performed an engine run-up, and everything was normal. During the subsequent takeoff when the airplane reached about 100 ft above the ground, the engine “unexpectedly stopped.” With no runway remaining to land, and buildings in front of him, he attempted to land in a field off to his left. The pilot had no further memory of the accident sequence. A witness, who watched the airplane depart, said that when the airplane reached about 100 ft above the ground, the engine made two “putt, putt, putt” sounds and went silent. He thought the engine started again but only momentarily. The airplane turned left and the witness thought the airplane was going to impact trees. He grabbed a fire extinguisher and responded to the field where the airplane crashed. The witness later observed the fuel selector in the “on” position and turned it off to prevent spillage or fire. The airplane came to rest upright in the opposite direction of travel, and there was no postimpact fire. The left wing and fuselage sustained substantial damage. The canopy was shattered and the engine was displaced aft and twisted in its mounts. The airplane wreckage was retained for further examination.
Verbatim NTSB factual narrative from the NTSB dataset
Sources
NTSB record ERA26LA231
- Event ID
- 20260608203133
- Case number
- ERA26LA231
- Dataset
- full-current
- Source SHA-256
- 5cf380f0061817c0331a6b2d8cc7e0ee3a79bea469a1001dc5c10e56f35f5ab3
Source notes (4)
- Unreviewed is an editorial label, not an investigation status. API-sourced is not report-checked or human-reviewed. Explicit event totals are used without summing aircraft injury tables; onboard allocation is withheld. Unknown values remain unknown. The operation category is mapped from the NTSB-reported FAR part and has not been reviewed.
- Filled from the NTSB case API where the bulk record had no value: investigation status, coordinates. Values present in the bulk record are kept.
- The date is the local date, which is the same as the UTC date the NTSB stores.
- API snapshot SHA-256: b7265da0c614093b98b179d2ece04c3d2f1c4a2951c18deb438ffbc56fc55052; retrieved 2026-09-17T05:09:23.380Z.