# NTSB investigations: Franklin 6V4 series, FL

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 ERA10CA262](https://openairdocs.org/ntsb/ERA10CA262.md): Hiller UH12 · Sarasota, FL · Accident · Minor injuries · Data collection · Final report · May 9, 2010 · N116S · Substantial damage
  > The pilot's delayed remedial action to maintain main rotor rpm, which resulted in a loss of lift and hard landing.
- [NTSB ANC04LA027](https://openairdocs.org/ntsb/ANC04LA027.md): Hiller UH-12B · Bradenton, FL · Accident · No injuries · Limited investigation · Final report · Feb 22, 2004 · N5304V · Substantial damage
  > The pilot's inadequate in-flight planning/decision which resulted in fuel exhaustion. Also causal was the pilot's failure to maintain adequate rotor speed, resulting in a hard landing.
- [NTSB MIA00LA111](https://openairdocs.org/ntsb/MIA00LA111.md): Hiller UH-12B · Sanford, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 17, 2000 · N5304V · Substantial damage
  > The pilot's improper collective and cyclic control usage during an emergency descent, following the onset of a 1 to 1 vibration for undetermined reasons, resulting in the helicopter landing hard and rolling over.
- [NTSB ATL99LA108](https://openairdocs.org/ntsb/ATL99LA108.md): Hiller UH12-C · Venice, FL · Accident · No injuries · Limited investigation · Final report · Jul 16, 1999 · N5317V · Substantial damage
  > Loss of engine power due to fuel starvation as a result of the passenger inadvertently shutting off the fuel supply.
- [NTSB MIA98LA170](https://openairdocs.org/ntsb/MIA98LA170.md): Bell 47G · Bunnell, FL · Accident · No injuries · Limited investigation · Final report · May 28, 1998 · N182JR · Substantial damage
  > The pilot-in-command(CFI) failure to maintain control of the aircraft.
- [NTSB MIA98LA051](https://openairdocs.org/ntsb/MIA98LA051.md): Bell 47D1 · Bunnell, FL · Accident · No injuries · Limited investigation · Final report · Jan 3, 1998 · N59326 · Substantial damage
  > the student pilot's improper planning/decision, which resulted in fuel exhaustion, loss of engine power, and a forced landing.
- [NTSB MIA94FA125](https://openairdocs.org/ntsb/MIA94FA125.md): Bell 47D1 · Marathon, FL · Accident · 2 fatal · Field investigation · Final report · Apr 22, 1994 · N9660 · Destroyed
  > Separation of the tail rotor gearbox and tail rotor blades for an undetermined reason. Factors related to the accident were: failure of maintenance personnel to follow the proper maintenance procedure after a previous tail rotor strike, and failure to conduct…
- [NTSB MIA93LA144](https://openairdocs.org/ntsb/MIA93LA144.md): Bell 47G · Panama City, FL · Accident · Minor injuries · Limited investigation · Final report · Jun 19, 1993 · N3628G · Substantial damage
  > Improper planning/decision by the pilot-in-command and his failure to maintain rotor RPM, which resulted in failure of the helicopter to attain effective translational lift. Factors related to the accident were: the fence & terrain conditions.
- [NTSB MIA93LA032](https://openairdocs.org/ntsb/MIA93LA032.md): Hiller UH-12C · New Smyrna Bch, FL · Accident · No injuries · Limited investigation · Final report · Dec 21, 1992 · N38767 · Substantial damage
  > The pilot-in-command's improper application of cyclic and collective pitch control during an autorotative landing.
- [NTSB MIA92LA069](https://openairdocs.org/ntsb/MIA92LA069.md): Bell 47D1 · Cross City, FL · Accident · No injuries · Limited investigation · Final report · Jan 27, 1992 · N93067 · Substantial damage
  > Partial loss of engine power due to undetermined reasons and unsuitable terrain encountered during the autorotative landing.
- [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 MIA90LA023](https://openairdocs.org/ntsb/MIA90LA023.md): Bell 47D1 · Loxahatchee, FL · Accident · Serious injuries · Limited investigation · Final report · Nov 2, 1989 · N93067 · Substantial damage
  > Failure of the pilot to maintain rotor RPM after pulling up from a swath run. A related factor was the presence of trees.
- [NTSB MIA89LA133](https://openairdocs.org/ntsb/MIA89LA133.md): Bell 47D1 · Miami, FL · Accident · Serious injuries · Limited investigation · Final report · Apr 17, 1989 · N342L · Substantial damage
  > The unqualified persons failure to maintain clearance from the fence. Pressure induced by others, lack of experience, and over confidence in personal ability are contributing factors to this accident.
- [NTSB MIA76DLA48](https://openairdocs.org/ntsb/MIA76DLA48.md): Bell 47D-1 · Lake Butler, FL · Accident · No injuries · Closed · May 21, 1976 · N74123 · Substantial damage
- [NTSB MIA76DKT59](https://openairdocs.org/ntsb/MIA76DKT59.md): Bell 47D1 · South Bay, FL · Accident · No injuries · Closed · Mar 1, 1976 · N12088 · Substantial damage
- [NTSB MIA76FLD46](https://openairdocs.org/ntsb/MIA76FLD46.md): Bell 47G · Clearwater, FL · Accident · Minor injuries · Closed · Feb 22, 1976 · N3628G · Substantial damage
- [NTSB MIA76DLA08](https://openairdocs.org/ntsb/MIA76DLA08.md): Bell 47D1 · Monticello, FL · Accident · No injuries · Closed · Aug 21, 1975 · N74123 · Substantial damage
- [NTSB MIA74DKT61](https://openairdocs.org/ntsb/MIA74DKT61.md): Bell 47D1 · Ochopee, FL · Accident · No injuries · Closed · Mar 16, 1974 · N9660 · Substantial damage
- [NTSB MIA73DKT67](https://openairdocs.org/ntsb/MIA73DKT67.md): Bell 47H-1 · Naples, FL · Accident · No injuries · Closed · Nov 26, 1972 · N2818B · Substantial damage
- [NTSB MIA72FKT22](https://openairdocs.org/ntsb/MIA72FKT22.md): Bell 47D-1 · South Bay, FL · Accident · No injuries · Closed · Oct 20, 1971 · N160B · Substantial damage
- [NTSB MIA69F0017](https://openairdocs.org/ntsb/MIA69F0017.md): Bell 47H-1 · Cape Canaverl, FL · Accident · No injuries · Closed · Apr 20, 1968 · N2891B · Substantial damage
- [NTSB MIA68A0011](https://openairdocs.org/ntsb/MIA68A0011.md): Bell 47D1 · Pnama Cty Bch, FL · Accident · No injuries · Closed · Jul 22, 1967 · N322A · Substantial damage
- [NTSB MIA66A0086](https://openairdocs.org/ntsb/MIA66A0086.md): Bell 47D1 · Florida City, FL · Accident · Minor injuries · Closed · Jan 31, 1966 · N322A · Substantial damage
- [NTSB MIA66A0082](https://openairdocs.org/ntsb/MIA66A0082.md): Bell 47G-1 · N.Miami Beach, FL · Accident · Serious injuries · Closed · Jan 13, 1966 · N2821B · Substantial damage
- [NTSB MIA66A0016](https://openairdocs.org/ntsb/MIA66A0016.md): Bell 47G · Panama City, FL · Accident · No injuries · Closed · Jul 26, 1965 · N3628G · Substantial damage
- [NTSB MIA65A0099](https://openairdocs.org/ntsb/MIA65A0099.md): Hiller UH12C · N Miami Beach, FL · Accident · No injuries · Closed · Apr 7, 1965 · N5317V · Substantial damage
- [NTSB UNK64X1986](https://openairdocs.org/ntsb/UNK64X1986.md): Bell 47H1 · Miami, FL · Accident · No injuries · Closed · May 28, 1964 · N981B · Substantial damage

## 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."eventStateOrRegion" = 'FL' AND c."eventCountry" = 'USA'
  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&state=FL

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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.