# NTSB investigations: Allison 250-C20 series, 2022

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 WPR23LA004](https://openairdocs.org/ntsb/WPR23LA004.md): Bell 206B · Fresno, CA · Accident · Serious injuries · Class 3 · Limited · Final report · Oct 1, 2022 · N284CA · Substantial damage
  > The disbond of a tail rotor drive shaft splined adapter, which resulted in a loss of tail rotor drive and a subsequent hard landing.
- [NTSB CEN22LA305](https://openairdocs.org/ntsb/CEN22LA305.md): Bell 206B · East Troy, WI · Accident · No injuries · Class 4 · Limited · Final report · Jul 1, 2022 · N882NY · Substantial damage
  > The pilot’s improper fuel management that resulted in fuel exhaustion and a loss of engine power.
- [NTSB WPR22LA236](https://openairdocs.org/ntsb/WPR22LA236.md): Bell 206B · Merced, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 24, 2022 · N915B · Substantial damage
  > The in-flight failure of the engine-to-transmission drive shaft due to a fatigue fracture of one of the KAflex flex frames caused by a loose bolt, which resulted in a total loss of power to the transmission and a subsequent hard landing.
- [NTSB ERA22LA206](https://openairdocs.org/ntsb/ERA22LA206.md): Bell 206 · Lake Apopka, FL · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 26, 2022 · N206BX · Substantial damage
  > A collision with water following a loss of visual reference to the water surface due to sun glare.
- [NTSB CEN22LA146](https://openairdocs.org/ntsb/CEN22LA146.md): Hughes 369 · Adair, IA · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 17, 2022 · N500MZ · Substantial damage
  > The mechanic’s failure to properly torque a fuel control unit B-nut, which resulted in a partial loss of engine power, an attempted autorotation, and an impact with terrain.
- [NTSB WPR22FA101](https://openairdocs.org/ntsb/WPR22FA101.md): Mcdonnell Douglas 500N · Newport Beach, CA · Accident · 1 fatal · Class 3 · Field · Final report · Feb 20, 2022 · N521HB · Substantial damage
  > The helicopter’s encounter with unanticipated right yaw during a low-altitude, low-airspeed, tight-radius orbit. Contributing to the accident was the pilot’s distraction during the orbit, which resulted in the loss of control, his fatigue due to his early…
- [NTSB ERA22LA117](https://openairdocs.org/ntsb/ERA22LA117.md): Hughes 369D · Bel Air, MD · Accident · No injuries · Class 3 · Limited · Final report · Feb 9, 2022 · N9159F · Substantial damage
  > A loss of engine power due to bearing failures in the turbine section resulting from a fatigue fracture of the oil supply line that fed oil to the Nos. 6 and 7 bearings. The oil line failure led to rapid deterioration of the bearings from oil starvation.…

## 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 year(c."eventDate") = 2022
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03020'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03020&year=2022

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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.