# NTSB investigations: Franklin 6V4 series, CA

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 1 of 2 · 58 cases

## Latest cases

- [NTSB WPR14LA180](https://openairdocs.org/ntsb/WPR14LA180.md): Bell 47G · El Monte, CA · Accident · Minor injuries · Limited investigation · Final report · May 3, 2014 · N7895B · Substantial damage
  > A partial loss of engine power during climbout due to a malfunctioning magneto and spark plugs.
- [NTSB WPR12LA029](https://openairdocs.org/ntsb/WPR12LA029.md): Bell 47D1 · San Diego, CA · Accident · No injuries · Limited investigation · Final report · Nov 8, 2011 · N4251A · Substantial damage
  > The flight instructor's inadequate supervision of the student pilot during a simulated autorotation and the pilots’ failure to use carburetor heat while operating at reduced engine power while in carburetor icing conditions, which resulted in a loss of engine…
- [NTSB WPR11LA469](https://openairdocs.org/ntsb/WPR11LA469.md): Bell 47D1 · Ahwahnee, CA · Accident · Serious injuries · Limited investigation · Final report · Sep 27, 2011 · N9158R · Substantial damage
  > The pilot’s failure to maintain adequate main rotor rpm during the landing approach, which resulted in a loss of control.
- [NTSB LAX06LA030](https://openairdocs.org/ntsb/LAX06LA030.md): Bell 47D1 · Rancho Murieta, CA · Accident · Serious injuries · Limited investigation · Final report · Nov 10, 2005 · N16356 · Substantial damage
  > a separation of the tail rotor assembly due to the reverse bending fatigue fracture of a tail rotor pitch change link bolt, resulting in a loss of control of the helicopter, and a hard landing during the uncontrolled descent.
- [NTSB LAX05LA112](https://openairdocs.org/ntsb/LAX05LA112.md): Hiller UH-12B · Thermal, CA · Accident · No injuries · Limited investigation · Final report · Mar 12, 2005 · N5311V · Substantial damage
  > the pilot's inadequate in-flight planning and failure to refuel the helicopter, which resulted in fuel exhaustion.
- [NTSB LAX05LA022](https://openairdocs.org/ntsb/LAX05LA022.md): Bell 47D1 · San Martin, CA · Accident · No injuries · Limited investigation · Final report · Oct 31, 2004 · N903B · Substantial damage
  > A loss of power for undetermined reasons.
- [NTSB LAX00LA288](https://openairdocs.org/ntsb/LAX00LA288.md): Bell 47D · Stockton, CA · Accident · No injuries · Limited investigation · Final report · Aug 5, 2000 · N39KH · Substantial damage
  > The pilot's inadequate planning by which he miscalculated fuel consumption which resulted in fuel exhaustion.
- [NTSB LAX96FA045](https://openairdocs.org/ntsb/LAX96FA045.md): Bell 47D1 · Shafter, CA · Accident · 2 fatal · Field investigation · Final report · Nov 12, 1995 · N78900 · Destroyed
  > the pilot misjudged the altitude and ground clearance while performing an unwarranted low altitude flight maneuver.
- [NTSB LAX95LA326](https://openairdocs.org/ntsb/LAX95LA326.md): Hiller UH-12C · Porterville, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 6, 1995 · N1348Z · Substantial damage
  > the flight instructor's inadequate supervision of the flight; the dual student's improper use of the flight controls; and improper remedial action.
- [NTSB LAX95LA238](https://openairdocs.org/ntsb/LAX95LA238.md): Hiller UH-12C · Rio Vista, CA · Accident · No injuries · Limited investigation · Final report · Jul 3, 1995 · N1348Z · Substantial damage
  > The result of a chafing failure of the left anti-torque control cable while the aircraft was in flight. An inadequate preflight inspection by the pilot-in-command, and an inadequate 100-hour inspection by company maintenance personnel were factors in this…
- [NTSB LAX88LA160](https://openairdocs.org/ntsb/LAX88LA160.md): Bell 47D1 · Taft, CA · Accident · No injuries · Limited investigation · Final report · Apr 13, 1988 · N917B · Substantial damage
- [NTSB LAX87LA294](https://openairdocs.org/ntsb/LAX87LA294.md): Bell 47D-1 · Taft, CA · Accident · No injuries · Limited investigation · Final report · Aug 5, 1987 · N917B · Substantial damage
  > The plt rprtd the eng lost power at about 300' AGL after the helicopter had flown aprx 2.7 hrs without refueling. He initiated an autorotative landing; however, before touchdown, the main rotor blades contacted & severed the tail boom. An exam revealed the…
- [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 LAX84LA108](https://openairdocs.org/ntsb/LAX84LA108.md): Bell 47G · El Cajon, CA · Accident · No injuries · Limited investigation · Final report · Dec 21, 1983 · N4475 · Substantial damage
  > During a demonstration to show his student how to autorotate fm a 2 ft height AGL the instructor reduced pwr and inadvertently applied fwd cyclic. The front portion of the skids hit the gd followed by the main rotor blades. Helicopter then rocked backwards,…
- [NTSB LAX82FA341](https://openairdocs.org/ntsb/LAX82FA341.md): Bell 47G-2 · San Diego, CA · Accident · Minor injuries · Field investigation · Final report · Sep 11, 1982 · N4242A · Destroyed
  > The plt was in the local pattern practicing maneuvers. After completing a quick stop maneuver & hovering, another takeoff was initiated. The plt stated that it seemed to take an unusual amount of forward cyclic to initiate forward flt. During the final…
- [NTSB LAX81DUG05](https://openairdocs.org/ntsb/LAX81DUG05.md): Hiller Acft UH-12B · Rialto, CA · Accident · No injuries · Closed · Nov 18, 1980 · N5310V · Destroyed
- [NTSB LAX80DVA64](https://openairdocs.org/ntsb/LAX80DVA64.md): Bell 47G · Bakersfield, CA · Accident · No injuries · Closed · Aug 23, 1980 · N148B · Substantial damage
- [NTSB LAX80FVM17](https://openairdocs.org/ntsb/LAX80FVM17.md): Bell 47D1 · Salinas, CA · Accident · No injuries · Closed · Mar 9, 1980 · N78900 · Substantial damage
- [NTSB LAX80FUQ11](https://openairdocs.org/ntsb/LAX80FUQ11.md): Bell 47G · Pacoima, CA · Accident · No injuries · Closed · Feb 26, 1980 · N182JR · Substantial damage
- [NTSB LAX79DUQ26](https://openairdocs.org/ntsb/LAX79DUQ26.md): Bell 47G2M · Guadalupe, CA · Accident · No injuries · Closed · Apr 2, 1979 · N6327D · Substantial damage
- [NTSB OAK78FVM46](https://openairdocs.org/ntsb/OAK78FVM46.md): Bell 47D1 · Castroville, CA · Accident · No injuries · Closed · Sep 17, 1978 · N78900 · Substantial damage
- [NTSB LAX78FUA13](https://openairdocs.org/ntsb/LAX78FUA13.md): Bell 47G · Torrance, CA · Accident · No injuries · Closed · Mar 25, 1978 · N4475 · Substantial damage
- [NTSB LAX77FUA06](https://openairdocs.org/ntsb/LAX77FUA06-201381.md): Bell 47D-1 · Long Beach, CA · Accident · Minor injuries · Closed · Feb 23, 1977 · N74120 · Substantial damage
- [NTSB LAX76FUQ32](https://openairdocs.org/ntsb/LAX76FUQ32.md): Bell 47D-1 · Lancaster, CA · Accident · No injuries · Closed · Apr 7, 1976 · N917B · Substantial damage
- [NTSB OAK76FVG43](https://openairdocs.org/ntsb/OAK76FVG43.md): Bell 47D-1 · Sacramento, CA · Accident · No injuries · Closed · Jan 13, 1976 · N2134 · Substantial damage
- [NTSB LAX76FVA18](https://openairdocs.org/ntsb/LAX76FVA18.md): Bell 47D-1 · Capistrano, CA · Accident · No injuries · Closed · Jan 1, 1976 · N9673Z · Substantial damage
- [NTSB OAK76DVM08](https://openairdocs.org/ntsb/OAK76DVM08.md): Bell 47G · King City, CA · Accident · Minor injuries · Closed · Aug 20, 1975 · N933B · 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 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 OAK74DVM02](https://openairdocs.org/ntsb/OAK74DVM02.md): Hiller Acft UH-12C · Gonzalez, CA · Accident · No injuries · Closed · Jul 13, 1973 · N5320V · Substantial damage
- [NTSB OAK73DVG41](https://openairdocs.org/ntsb/OAK73DVG41.md): Bell 47D1 · Marysville, CA · Accident · No injuries · Closed · Jan 27, 1973 · N10190 · Destroyed
- [NTSB LAX72DVA60](https://openairdocs.org/ntsb/LAX72DVA60.md): Bell 47G · Wasco, CA · Accident · No injuries · Closed · Apr 2, 1972 · N153B · 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 LAX71FUA08](https://openairdocs.org/ntsb/LAX71FUA08.md): Hiller Acft UH-12A · Tustin, CA · Accident · No injuries · Closed · Aug 4, 1970 · N2827D · Substantial damage
- [NTSB LAX70FUD08](https://openairdocs.org/ntsb/LAX70FUD08.md): Bell 47D · Venice, CA · Accident · No injuries · Closed · Mar 18, 1970 · N234B · Substantial damage
- [NTSB OAK70DVM09](https://openairdocs.org/ntsb/OAK70DVM09.md): Hiller Acft UH-12C · Castroville, CA · Accident · Minor injuries · Closed · Mar 17, 1970 · N5320V · Destroyed
- [NTSB LAX70F0171](https://openairdocs.org/ntsb/LAX70F0171.md): Bell 47D1 · Santa Ana, CA · Accident · No injuries · Closed · Oct 10, 1969 · N9673Z · Substantial damage
- [NTSB LAX70D0129](https://openairdocs.org/ntsb/LAX70D0129.md): Bell 47D1 · Shafter, CA · Accident · No injuries · Closed · Sep 13, 1969 · N153B · Substantial damage
- [NTSB OAK70D0145](https://openairdocs.org/ntsb/OAK70D0145.md): Bell 47G · Hollister, CA · Accident · Minor injuries · Closed · Sep 8, 1969 · N7985A · Destroyed
- [NTSB LAX69D0326](https://openairdocs.org/ntsb/LAX69D0326.md): Bell 47D1 · Calabasas, CA · Accident · No injuries · Closed · Apr 30, 1969 · N8116 · Substantial damage
- [NTSB LAX69D0317](https://openairdocs.org/ntsb/LAX69D0317.md): Hiller UH-12C · Compton, CA · Accident · No injuries · Closed · Feb 13, 1969 · N5326V · Substantial damage
- [NTSB LAX68A0068](https://openairdocs.org/ntsb/LAX68A0068.md): Bell 47G-2 · Culver City, CA · Accident · No injuries · Closed · Jan 17, 1968 · N412SF · Substantial damage
- [NTSB LAX68A0021](https://openairdocs.org/ntsb/LAX68A0021.md): Bell 47D1 · Buttonwilow, CA · Accident · No injuries · Closed · Aug 18, 1967 · N10190 · Substantial damage
- [NTSB LAX67A0105](https://openairdocs.org/ntsb/LAX67A0105.md): Bell 47G · Bakersfield, CA · Accident · No injuries · Closed · May 8, 1967 · N148B · Substantial damage
- [NTSB LAX67A0103](https://openairdocs.org/ntsb/LAX67A0103.md): Bell 47D1 · Bakersfield, CA · Accident · No injuries · Closed · May 3, 1967 · N12888 · Substantial damage
- [NTSB OAK67A0071](https://openairdocs.org/ntsb/OAK67A0071.md): Bell 47D1 · Martinez, CA · Accident · 3 fatal · Closed · Mar 25, 1967 · N74123 · Destroyed
- [NTSB LAX67A0043](https://openairdocs.org/ntsb/LAX67A0043.md): Bell 47D1 · Fontana, CA · Accident · No injuries · Closed · Oct 31, 1966 · N5166V · Substantial damage

Next page: https://openairdocs.org/ntsb.md?engine=27033&state=CA&page=2

## 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" = 'CA' 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=CA

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