# NTSB investigations: Franklin 6V4 series, 1984

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 LAX85LA079](https://openairdocs.org/ntsb/LAX85LA079.md): Bell 47G · Chatsworth, CA · Accident · No injuries · Limited investigation · Final report · Dec 22, 1984 · N182JR · Destroyed
  > The plt was practicing off airport touch & go's. on the second lndg the left skid contacted a hidden dirt embankment andthe acft rolled over. A post impact fire consumed the aircraft. Both certificated commercial plts aboard the helicopter escaped unharmed.…
- [NTSB FTW85LA074](https://openairdocs.org/ntsb/FTW85LA074.md): Bell 47D1 · Ardmore, OK · Accident · Serious injuries · Limited investigation · Final report · Dec 7, 1984 · N5226 · Substantial damage
  > The acft collided with power lines during a recovery from a practice autorotational landing. The instructor plt took control of the acft for recovery and did not see the wires.
- [NTSB FTW85LA043](https://openairdocs.org/ntsb/FTW85LA043.md): Bell 47D1 · Terlingua, TX · Accident · No injuries · Limited investigation · Final report · Nov 4, 1984 · N93067 · Substantial damage
  > Shortly after the plt took off on a sight-seeing flt, the eng lost power when the helicopter was over rough terrain at about 200 ft AGL. During an autorotative landing, the helicopter rocked forward causing the main rotor blades to strike the tail boom.…
- [NTSB CHI84LA184](https://openairdocs.org/ntsb/CHI84LA184.md): Bell 47D1 · Alpena, MI · Accident · Serious injuries · Limited investigation · Final report · May 20, 1984 · N9158R · Destroyed
  > Prior to the accident, the owner/plt of the helicopter reportedly 'buzzed' a local baseball game. Shortly after that, the helicopter was observed to maneuver over a wooded area, enter a nose high attitude, then roll or bank & enter a descent into a wooded…
- [NTSB CHI84LA181](https://openairdocs.org/ntsb/CHI84LA181.md): Bell 47D-1 · Ridge Farm, IL · Accident · No injuries · Limited investigation · Final report · May 6, 1984 · N13012 · Substantial damage
  > The helicopter rolled over after a hard landing following loss of rotor RPM. The plt reported that during initial climb at about 300 ft AGL the rotor decreased about 500 RPM. He tried to regain rotor RPM until about 100 ft AGL and then tried an autorotation.…
- [NTSB MIA84FA058](https://openairdocs.org/ntsb/MIA84FA058.md): Hiller UH-12C · San Juan, PR · Accident · 1 fatal · Field investigation · Final report · Jan 12, 1984 · N5317V · No damage
  > A performer fell from a trapeze rigged below the helicopter while it was hovering at about 150 ft AGL. The FAA had not authorized the modification to the acft. The plt was not certified for external load operations. The performer reportedly had not done this…

## 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") = 1984
  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=1984

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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.