# NTSB investigations: Amateur-built UNKNOWN ENG, NH

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

## Latest cases

- [NTSB ERA26LA231](https://openairdocs.org/ntsb/ERA26LA231.md): Olson/Williams Sonex · Jaffrey, NH · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Jun 5, 2026 · N28YD · Substantial damage
  > 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…
- [NTSB GAA18CA033](https://openairdocs.org/ntsb/GAA18CA033.md): Evolution Revo · Berlin, NH · Accident · No injuries · Data collection · Final report · Oct 29, 2017 · N401HK · Substantial damage
  > The pilot’s failure to center the ground steering before landing, which resulted in a loss of directional control.
- [NTSB GAA17CA052](https://openairdocs.org/ntsb/GAA17CA052.md): Chaudoin George S RV 10 · Portsmouth, NH · Accident · No injuries · Data collection · Final report · Oct 4, 2016 · N710GC · Substantial damage
  > The pilot’s failure to go around after recognizing that the airplane was high and fast, which resulted in a long landing on a wet runway and a runway excursion.
- [NTSB NYC98FA129](https://openairdocs.org/ntsb/NYC98FA129.md): Hawker Hunter T MK 8 · Manchester, NH · Accident · 1 fatal · Field investigation · Final report · Jun 18, 1998 · N745WT · Destroyed
  > Fuel exhaustion, resulting from the pilot's reliance on an inaccurate fuel quantity indicating system. A factor in the pilot's death was his intentional delay of the ejection sequence in order to avoid people and property on the ground.
- [NTSB NYC97LA163](https://openairdocs.org/ntsb/NYC97LA163.md): Elliot Monnett Moni · Hollis, NH · Accident · 1 fatal · Limited investigation · Final report · Aug 9, 1997 · N2400M · Destroyed
  > The pilot's failure to maintain adequate airspeed which resulted in an inadvertent stall spin and collision with terrain.
- [NTSB NYC91DNC04](https://openairdocs.org/ntsb/NYC91DNC04.md): Laurent A. Cloutier BD-5B · Gilford, NH · Accident · Minor injuries · Final report · Aug 3, 1991 · N245BD · Substantial damage
  > Engine failure due to a faulty oil pressure relief valve resulting in an emergency landing on unsuitable terrain.
- [NTSB NYC86FNC09](https://openairdocs.org/ntsb/NYC86FNC09.md): Cessna 205 · Twin Mountain, NH · Accident · Minor injuries · Final report · Sep 20, 1986 · N27WD · Substantial damage
  > During a 'bomb drop' contest at an organized 'fly-in', the pilot was maneuvering at low airspeed so his passenger could drop a water-filled balloon on a target which had been placed on runway 27. The acft suddenly banked to the right and pitched down striking…
- [NTSB NYC86DNC06](https://openairdocs.org/ntsb/NYC86DNC06.md): Hansen Hawk 304 · Wolfeboro, NH · Accident · Minor injuries · Final report · Jul 22, 1986 · N13CH · Substantial damage
  > The experimental aircraft equipped with a buick V-8 aluminum block engine experienced power loss on approach for landing. The pilot decided that the distance and terrain was too great for a glide to the airport, and an emergency water landing in a nearby lake…

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."eventStateOrRegion" = 'NH' AND c."eventCountry" = 'USA'
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('99999'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=99999&state=NH

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.