ERA26LA231

NTSB accident investigation · Olson/Williams Sonex · Jaffrey, NH · June 5, 2026

Accident · Serious injuriesClass 3 · LimitedPreliminary report
Date
June 5, 2026, 11:00 local (15:00 UTC)
Place
Jaffrey, NH · On Airport
Injuries
1 serious
Damage
Substantial damage
Phase of flight
Takeoff
Aircraft
N28YDOlson/Williams Sonex
Defining event
Takeoff: Loss of engine power (total)
Weather
Visual (VMC) · Day
Status
Investigation ongoing
Investigation class
Class 3
NTSB office
Eastern Region Aviation
Parties
FAA/FSDO
FAA report
20260605005239A
Case key
203133

From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.

On this page

Preliminary report

What NTSB knew early in the investigation. It may change in the final report.

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.

Sequence of events

The events NTSB coded, in order, by phase of flight. The defining event is the one that best describes the accident. Under each, the cases with the same event anywhere in their sequence.

Aircraft

Registration
N28YD
Reported as
Olson/Williams Sonex
Category
Airplane
Serial number
533
Built
2007
Airframe hours
367
Damage
Substantial damage
Flight
Personal · Part 91
Airworthiness certificate
Special, Experimental light sport (Special)
Last inspection
Condition · October 22, 2025
Airport
AFN · Jaffrey Airfield Silver Ranch, runway 16/34, 2,982 × 134 ft, asphalt
Equipment
ADS-B

Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

Weather

Conditions
Visual (VMC) · Day
Temperature
80 °F
Observed at
AFN, 0.25 nm away

FAA reports on this event · 1

The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.