# NTSB investigations: Franklin 6V4 series

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.

Page 4 of 6 · 285 cases

## Cases, newest first

- [NTSB MKC75FCQ52](https://openairdocs.org/ntsb/MKC75FCQ52.md): Bell 47D1 · Holcomb, KS · Accident · No injuries · Closed · Jun 12, 1975 · N7735 · Substantial damage
- [NTSB CHI75DEV36](https://openairdocs.org/ntsb/CHI75DEV36.md): Bell 47D-1 · Carmi, IL · Accident · No injuries · Closed · Jun 6, 1975 · N74121 · Destroyed
- [NTSB FTW75DPG70](https://openairdocs.org/ntsb/FTW75DPG70.md): Tomcat MK-5 · Corning, AR · Accident · No injuries · Closed · May 26, 1975 · N4924C · Substantial damage
- [NTSB IAD76FKW17](https://openairdocs.org/ntsb/IAD76FKW17.md): Bell 47H1 · Nashville, TN · Accident · Serious injuries · Closed · May 20, 1975 · N13172 · Substantial damage
- [NTSB OAK75FVG66](https://openairdocs.org/ntsb/OAK75FVG66.md): Bell 47D-1 · Sacramento, CA · Accident · No injuries · Closed · May 13, 1975 · N342L · Substantial damage
- [NTSB NYC75FGM32](https://openairdocs.org/ntsb/NYC75FGM32.md): Hiller Acft UH-12B · Beaver Falls, PA · Accident · No injuries · Closed · Apr 1, 1975 · N90424 · Substantial damage
- [NTSB IAD75FKW13](https://openairdocs.org/ntsb/IAD75FKW13.md): Bell 47H · Nashville, TN · Accident · No injuries · Closed · Apr 1, 1975 · N981B · Substantial damage
- [NTSB LAX75FUQ09](https://openairdocs.org/ntsb/LAX75FUQ09.md): Bell 47G · Lancaster, CA · Accident · No injuries · Closed · Sep 27, 1974 · N6327D · Substantial damage
- [NTSB OAK75FVG13](https://openairdocs.org/ntsb/OAK75FVG13.md): Bell 47G · Sacramento, CA · Accident · No injuries · Closed · Aug 13, 1974 · N7985A · Substantial damage
- [NTSB LAX75FUA04](https://openairdocs.org/ntsb/LAX75FUA04.md): Bell 47D-1 · Seal Beach, CA · Accident · No injuries · Closed · Jul 28, 1974 · N5226 · Substantial damage
- [NTSB FTW75DPG02](https://openairdocs.org/ntsb/FTW75DPG02.md): Bell 47D-1 · Almyra, AR · Accident · No injuries · Closed · Jul 6, 1974 · N13012 · Substantial damage
- [NTSB MIA75FLG02](https://openairdocs.org/ntsb/MIA75FLG02.md): Bell 47G · Myrtle Beach, SC · Accident · No injuries · Closed · Jul 5, 1974 · N1773 · Substantial damage
- [NTSB FTW74FPM29](https://openairdocs.org/ntsb/FTW74FPM29.md): EL Tomcat 47 · Zafra, OK · Accident · No injuries · Closed · Jun 19, 1974 · N4227A · Destroyed
- [NTSB CHI74FEK26](https://openairdocs.org/ntsb/CHI74FEK26.md): Bell 47D1 · Circleville, OH · Accident · No injuries · Closed · May 21, 1974 · N157B · Substantial damage
- [NTSB CHI74FEV49](https://openairdocs.org/ntsb/CHI74FEV49.md): Hiller Acft UH-12A · Springfield, IL · Accident · No injuries · Closed · May 1, 1974 · N7636B · Substantial damage
- [NTSB CHI74DEM57](https://openairdocs.org/ntsb/CHI74DEM57.md): Bell 47G · Hart, MI · Accident · Minor injuries · Closed · May 1, 1974 · N4734S · Substantial damage
- [NTSB SEA74DYE42](https://openairdocs.org/ntsb/SEA74DYE42.md): Bell 47G-2 · Centralia, WA · Accident · No injuries · Closed · Apr 18, 1974 · N984B · 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 LAX74DUJ24](https://openairdocs.org/ntsb/LAX74DUJ24.md): Hiller Acft UH-12B · Tucson, AZ · Accident · No injuries · Closed · Sep 28, 1973 · N7299 · Substantial damage
- [NTSB MIA74FKA04](https://openairdocs.org/ntsb/MIA74FKA04.md): Hiller Acft UH-12A · St Thomas, VI · Accident · No injuries · Closed · Sep 12, 1973 · N8151H · Substantial damage
- [NTSB OAK74DVM02](https://openairdocs.org/ntsb/OAK74DVM02.md): Hiller Acft UH-12C · Gonzalez, CA · Accident · No injuries · Closed · Jul 13, 1973 · N5320V · 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 SEA74AYE04](https://openairdocs.org/ntsb/SEA74AYE04.md): Bell 47D · Anacortes, WA · Accident · No injuries · Closed · Jul 7, 1973 · N964B · Substantial damage
- [NTSB SEA73FYG36](https://openairdocs.org/ntsb/SEA73FYG36.md): Bell Tomcat · Harrington, WA · Accident · Serious injuries · Closed · May 26, 1973 · N73865 · 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 OAK73DVG41](https://openairdocs.org/ntsb/OAK73DVG41.md): Bell 47D1 · Marysville, CA · Accident · No injuries · Closed · Jan 27, 1973 · N10190 · Destroyed
- [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 MIA73DKT67](https://openairdocs.org/ntsb/MIA73DKT67.md): Bell 47H-1 · Naples, FL · Accident · No injuries · Closed · Nov 26, 1972 · N2818B · Substantial damage
- [NTSB CHI73FEM24](https://openairdocs.org/ntsb/CHI73FEM24.md): Bell 47G · Mt Pleasant, MI · Accident · Minor injuries · Closed · Oct 26, 1972 · N141B · Substantial damage
- [NTSB NYCA3FKM14](https://openairdocs.org/ntsb/NYCA3FKM14.md): Bell 47D1 · Charlotte, NC · Accident · No injuries · Closed · Oct 6, 1972 · N13012 · Substantial damage
- [NTSB FTW73DPG34](https://openairdocs.org/ntsb/FTW73DPG34.md): Bell 47D · Plumerville, AR · Accident · No injuries · Closed · Sep 20, 1972 · N925V · Substantial damage
- [NTSB CHI73DEI14](https://openairdocs.org/ntsb/CHI73DEI14.md): Bell 47G · Oregon, OH · Accident · No injuries · Closed · Aug 27, 1972 · N7895B · 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 LAX72DVA60](https://openairdocs.org/ntsb/LAX72DVA60.md): Bell 47G · Wasco, CA · Accident · No injuries · Closed · Apr 2, 1972 · N153B · Destroyed
- [NTSB FTW72FPA09](https://openairdocs.org/ntsb/FTW72FPA09.md): Bell 47D1 · Carrollton, TX · Accident · No injuries · Closed · Oct 24, 1971 · N7735 · 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 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 NYC72DFA08](https://openairdocs.org/ntsb/NYC72DFA08.md): Bell 47-G · Malone, NY · Accident · No injuries · Closed · Aug 21, 1971 · N932B · Destroyed
- [NTSB MKC72FCJ19](https://openairdocs.org/ntsb/MKC72FCJ19.md): Bell 47D1 · Bellwood, NE · Accident · Serious injuries · Closed · Aug 21, 1971 · N903B · Destroyed
- [NTSB MIA72FLG08](https://openairdocs.org/ntsb/MIA72FLG08.md): Bell 47D-1 · Cheraw, SC · Accident · No injuries · Closed · Aug 14, 1971 · N908B · Substantial damage
- [NTSB MKC72IK008](https://openairdocs.org/ntsb/MKC72IK008.md): Bell 47G · St Louis, MO · Incident · Serious injuries · Closed · Aug 3, 1971 · N54047 · Substantial damage
- [NTSB FTW71FPD52](https://openairdocs.org/ntsb/FTW71FPD52.md): Hiller UH12B · Arlington, TX · Accident · No injuries · Closed · Apr 28, 1971 · N10195 · Destroyed
- [NTSB LAX71FUA47](https://openairdocs.org/ntsb/LAX71FUA47.md): Bell 47D1 · Long Beach, CA · Accident · No injuries · Closed · Feb 8, 1971 · N74124 · Substantial damage
- [NTSB OAK71FVA53](https://openairdocs.org/ntsb/OAK71FVA53.md): Hiller UH12B · Fresno, CA · Accident · No injuries · Closed · Jan 17, 1971 · N5104V · Substantial damage
- [NTSB NYC71FHA13](https://openairdocs.org/ntsb/NYC71FHA13.md): Hiller Acft UH-12A · Fountainville, PA · Accident · No injuries · Closed · Aug 30, 1970 · N10322 · Substantial damage

Next page: https://openairdocs.org/ntsb.md?engine=27033&page=5

## 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."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&page=4

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