# NTSB investigations: Allison 250 SER 250HP, 2020

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 ERA21LA040](https://openairdocs.org/ntsb/ERA21LA040.md): Bell 206 · Raleigh, NC · Accident · No injuries · Class 4 · Limited · Final report · Nov 8, 2020 · N123NC · Substantial damage
  > The pilot's loss of helicopter control after entry into vortex ring state, which resulted in main rotor blade contact with the tailboom, and impact with the ground.
- [NTSB ERA21LA023](https://openairdocs.org/ntsb/ERA21LA023.md): Bell 206 · Zephyrhills, FL · Accident · No injuries · Class 3 · Limited · Final report · Oct 16, 2020 · N777CP · Substantial damage
  > Improper torquing of the “B” nut at the fuel control unit, which led to a total loss of engine power and subsequent autorotation that resulted in substantial damage.
- [NTSB CEN20LA328](https://openairdocs.org/ntsb/CEN20LA328.md): Bell 206 · Marathon, TX · Accident · 3 fatal · Class 3 · Limited · Final report · Aug 8, 2020 · N284S · Destroyed
  > The in-flight loss of helicopter control for reasons that could not be determined based on the available evidence.
- [NTSB CEN20LA113](https://openairdocs.org/ntsb/CEN20LA113.md): Bell 206 · Clark, MO · Accident · No injuries · Class 3 · Limited · Final report · Mar 5, 2020 · N32AE · Substantial damage
  > The fatigue failure of the pneumatic line for reasons that could not be determined, which resulted in a loss of engine power and subsequent hard landing.

## 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") = 2020
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03002', '03003'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03002&year=2020

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