# NTSB investigations: Pratt & Whitney R-985 series: Unknown or undetermined

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 ERA26FA341](https://openairdocs.org/ntsb/ERA26FA341.md): Weatherly 620 · Lynchburg, SC · Accident · 1 fatal · Class 3 · Field · Preliminary report · Sep 17, 2026 · N20003 · Substantial damage
  > On September 17, 2026, about 0720 eastern daylight time, a Weatherly Aviation Company Inc. 602B, N20003, was substantially damaged when it was involved in an accident near Lynchburg, South Carolina. The pilot was fatally injured. The airplane was operated as…
- [NTSB ANC24LA073](https://openairdocs.org/ntsb/ANC24LA073.md): De Havilland DHC2 · Anchorage, AK · Accident · No injuries · Class 3 · Limited · Final report · Aug 2, 2024 · N4444Z · Substantial damage
  > A partial loss of power during takeoff climb for undetermined reasons.
- [NTSB ANC24LA049](https://openairdocs.org/ntsb/ANC24LA049.md): Dehavilland Beaver L-20A (DHC-2) · Port Alsworth, AK · Accident · Serious injuries · Class 3 · Limited · Final report · Jun 11, 2024 · N4957 · Substantial damage
  > A partial loss of engine power for reasons that could not be determined.
- [NTSB ANC23LA054](https://openairdocs.org/ntsb/ANC23LA054.md): Dehavilland DHC-2 MK. I(L20A) · Twin Hills, AK · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 13, 2023 · N302BL · Substantial damage
  > The pilot’s loss of control during initial climb for reasons that could not be determined.
- [NTSB CEN23LA232](https://openairdocs.org/ntsb/CEN23LA232.md): Grumman Acft ENG Cor-Schweizer G-164B · Bloomfield, NE · Accident · No injuries · Class 3 · Limited · Final report · Jun 7, 2023 · N48485 · Substantial damage
  > A partial loss of engine power during takeoff for reasons that could not be determined.
- [NTSB CEN22LA354](https://openairdocs.org/ntsb/CEN22LA354.md): Air Tractor AT-301 · Lamoni, IA · Accident · No injuries · Class 3 · Limited · Final report · Aug 1, 2022 · N4326S · Destroyed
  > A loss of airplane performance for reasons that could not be determined.
- [NTSB ANC18FA063](https://openairdocs.org/ntsb/ANC18FA063.md): De Havilland DHC-2 · Talkeetna, AK · Accident · 5 fatal · Field investigation · Final report · Aug 5, 2018 · N323KT · Substantial damage
  > Impact with terrain for reasons that could not be determined because the airplane was not recovered due to the inaccessible nature of the accident site.
- [NTSB CEN15LA204](https://openairdocs.org/ntsb/CEN15LA204.md): Grumman G 164A · Maysville, OK · Accident · Minor injuries · Limited investigation · Final report · Apr 15, 2015 · N7951 · Substantial damage
  > The loss of engine power for reasons that could not be determined because a postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation.

## 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."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('52008')
    AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '000'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb-events/000/cases?engine=52008

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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.