# NTSB investigations: Franklin 6V4 series, TX

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 WPR26LA247](https://openairdocs.org/ntsb/WPR26LA247.md): Bell 47G · Springtown, TX · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 3, 2026 · N7985A · Substantial damage
  > The pilot’s failure to maintain clearance from trees while in a low hover.
- [NTSB CEN17LA113](https://openairdocs.org/ntsb/CEN17LA113.md): Bell-Transworld Helicopters 47D1 · Archer City, TX · Accident · Serious injuries · Limited investigation · Final report · Feb 9, 2017 · N2875F · Substantial damage
  > The total loss of engine power due to fuel starvation, which resulted from the pilot’s inadvertent positioning of the mixture control to the “fuel cutoff” position.
- [NTSB FTW89DPA03](https://openairdocs.org/ntsb/FTW89DPA03.md): Bell 47-D1 · Allen, TX · Accident · Serious injuries · Final report · Dec 2, 1988 · N74124 · Substantial damage
  > Unqualified pilot's poor judgement in leveling the helicopter during the flare and contributing to this was his lack of total experience in this type aircraft.
- [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 FTW82DA073](https://openairdocs.org/ntsb/FTW82DA073.md): Bell 47G · Dallas, TX · Accident · No injuries · Final report · Feb 28, 1982 · N1773 · Substantial damage
  > The pilot attempted to land on a narrow flatbed trailer. He stated that he encountered some buffeting from the wind funneling between two hangars. On his third attempt to position the helicopter on the trailer, the right skid slipped off. The main rotor…
- [NTSB FTW81FA045](https://openairdocs.org/ntsb/FTW81FA045.md): Bell 47D1 · Roanoke, TX · Accident · Minor injuries · Closed · Feb 10, 1981 · N9736Z · Substantial damage
- [NTSB FTW77FRA13](https://openairdocs.org/ntsb/FTW77FRA13.md): Bell 47D1 · Houston, TX · Accident · No injuries · Closed · Feb 27, 1977 · N9736Z · Substantial damage
- [NTSB FTW77FRG02](https://openairdocs.org/ntsb/FTW77FRG02.md): Bell 47G · Kerrville, TX · Accident · Serious injuries · Closed · Oct 12, 1976 · N2772 · Destroyed
- [NTSB FTW76FPA15](https://openairdocs.org/ntsb/FTW76FPA15.md): Bell 47D-1 · Irving, TX · Accident · No injuries · Closed · Dec 7, 1975 · N5226 · Substantial damage
- [NTSB FTW74DPD01](https://openairdocs.org/ntsb/FTW74DPD01.md): Hiller UH-12A · Dublin, TX · Accident · No injuries · Closed · Jul 13, 1973 · N6448D · Substantial damage
- [NTSB FTW73FPD37](https://openairdocs.org/ntsb/FTW73FPD37.md): Bell 47D1 · Decatur, TX · Accident · No injuries · Closed · May 21, 1973 · N74121 · Substantial damage
- [NTSB FTW73DPD34](https://openairdocs.org/ntsb/FTW73DPD34.md): Hiller Acft UH-12C · Justin, TX · Accident · No injuries · Closed · May 14, 1973 · N5328V · Destroyed
- [NTSB FTW73DRG66](https://openairdocs.org/ntsb/FTW73DRG66.md): Bell 47G · San Antonio, TX · Accident · No injuries · Closed · Apr 4, 1973 · N2772 · Substantial damage
- [NTSB FTW73DPD17](https://openairdocs.org/ntsb/FTW73DPD17.md): Hiller Acft UH-12C · Valley View, TX · Accident · No injuries · Closed · Dec 23, 1972 · N5328V · Substantial damage
- [NTSB FTW72FPD48](https://openairdocs.org/ntsb/FTW72FPD48.md): Bell 47H-1 · Graham, TX · Accident · No injuries · Closed · Jun 23, 1972 · N4958E · Destroyed
- [NTSB FTW72DPD40](https://openairdocs.org/ntsb/FTW72DPD40.md): Bell 47D1 · Glen Rose, TX · Accident · No injuries · Closed · May 8, 1972 · N74121 · Substantial damage
- [NTSB FTW72FPA09](https://openairdocs.org/ntsb/FTW72FPA09.md): Bell 47D1 · Carrollton, TX · Accident · No injuries · Closed · Oct 24, 1971 · N7735 · Substantial damage
- [NTSB FTW72FPA07](https://openairdocs.org/ntsb/FTW72FPA07.md): Hiller UH-12C · Lorena, TX · Accident · No injuries · Closed · Oct 7, 1971 · N73875 · Substantial damage
- [NTSB FTW72DPD18](https://openairdocs.org/ntsb/FTW72DPD18.md): Hiller UH12C · Grandview, TX · Accident · No injuries · Closed · Sep 14, 1971 · N73875 · Substantial damage
- [NTSB FTW72DPD09](https://openairdocs.org/ntsb/FTW72DPD09.md): Hiller UH12C · Roanoke, TX · Accident · No injuries · Closed · Sep 5, 1971 · N5328V · Substantial damage
- [NTSB FTW71FPD52](https://openairdocs.org/ntsb/FTW71FPD52.md): Hiller UH12B · Arlington, TX · Accident · No injuries · Closed · Apr 28, 1971 · N10195 · Destroyed
- [NTSB FTW70FPD05](https://openairdocs.org/ntsb/FTW70FPD05.md): Bell 47G · Fort Worth, TX · Accident · No injuries · Closed · Mar 5, 1970 · N16657 · Substantial damage
- [NTSB FTW70FPA07](https://openairdocs.org/ntsb/FTW70FPA07.md): Bell 47D1 · Howe, TX · Accident · No injuries · Closed · Mar 4, 1970 · N74121 · Substantial damage
- [NTSB FTW70FRG10](https://openairdocs.org/ntsb/FTW70FRG10.md): Bell 47D1 · Randolph Afb, TX · Accident · No injuries · Closed · Feb 14, 1970 · N4229A · Substantial damage
- [NTSB FTW69F0497](https://openairdocs.org/ntsb/FTW69F0497.md): Bell 47D1 · Powell, TX · Accident · No injuries · Closed · May 13, 1969 · N7735 · Substantial damage
- [NTSB FTW69F0491](https://openairdocs.org/ntsb/FTW69F0491.md): Bell 47G · Fort Worth, TX · Accident · No injuries · Closed · May 2, 1969 · N16657 · Substantial damage
- [NTSB FTW69F0246](https://openairdocs.org/ntsb/FTW69F0246.md): Bell 47H-1 · Houston, TX · Accident · No injuries · Closed · Oct 5, 1968 · N996B · Substantial damage
- [NTSB FTW68A0029](https://openairdocs.org/ntsb/FTW68A0029.md): Bell 47D1 · Irving, TX · Accident · No injuries · Closed · Sep 8, 1967 · N8116 · Substantial damage
- [NTSB FTW65A0109](https://openairdocs.org/ntsb/FTW65A0109.md): Hiller UH12B · Mcallen, TX · Accident · No injuries · Closed · May 4, 1965 · N10195 · Substantial damage
- [NTSB FTW65A0095](https://openairdocs.org/ntsb/FTW65A0095.md): Hiller UH12B · San Antonio, TX · Accident · No injuries · Closed · Mar 29, 1965 · N6448D · Substantial damage
- [NTSB UNK65X1015](https://openairdocs.org/ntsb/UNK65X1015.md): Hiller UH-12B · Pharr, TX · Accident · No injuries · Closed · Dec 14, 1964 · N10195 · Substantial damage
- [NTSB UNK65X1004](https://openairdocs.org/ntsb/UNK65X1004.md): Hiller UH12A · Austin, TX · Accident · No injuries · Closed · Dec 13, 1964 · N6444D · 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" = 'TX' 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=TX

---
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.