# NTSB investigations: Franklin 6V4 series, 1990

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 CHI90DEC04](https://openairdocs.org/ntsb/CHI90DEC04.md): Bell 47 D-1 · Stockbridge, MI · Accident · Serious injuries · Final report · Aug 14, 1990 · N3656F · Destroyed
  > The restricted visual lookout which resulted from the canopy fogging up.
- [NTSB NYC90DGM02](https://openairdocs.org/ntsb/NYC90DGM02.md): Bell 47D1 · Meadville, PA · Accident · 1 fatal · Final report · Jun 22, 1990 · N310A · Destroyed
  > The pilot's failure to see and avoid the power lines.
- [NTSB BFO90LA042](https://openairdocs.org/ntsb/BFO90LA042.md): Bell 47D · Baltimore, MD · Accident · No injuries · Limited investigation · Final report · May 13, 1990 · N4229A · Substantial damage
  > The pilot applied excessive cyclic control, causing the main rotor to flex and severe the tail cone.
- [NTSB MIA90LA111](https://openairdocs.org/ntsb/MIA90LA111.md): Hiller UH-12B · Sanford, FL · Accident · No injuries · Limited investigation · Final report · Apr 26, 1990 · N5306V · Substantial damage
  > Loss of engine power for an unknown reason.
- [NTSB ATL90DLQ01](https://openairdocs.org/ntsb/ATL90DLQ01.md): Bell 47D1 · Hickman, KY · Accident · No injuries · Final report · Apr 24, 1990 · N2134 · Substantial damage
  > Improper in-flight planning/decision by the pilot. The resultant tailwind was a related factor.

## 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") = 1990
  AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('27033'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=27033&year=1990

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