# NTSB OAK76DVM08: Bell 47G, N933B, King City, CA, August 20, 1975

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 20, 1975
- Place: King City, CA · KING CITY, CA
- Location: 36.2163° N, 121.1320° W: Placed by OpenAirDocs: center of King City, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.2163&lon=-121.1320&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 23, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 150589
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK76DVM08
- Page: https://openairdocs.org/ntsb/OAK76DVM08

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2768  75/8/20    KING CITY,CA        BELL 47G            CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 1332
        TIME - 1230                    N933B               PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 996 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - MESA DEL REY
        DEPARTURE POINT             INTENDED DESTINATION
          KING CITY,CA                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-ON LANDING
           GEAR COLLAPSED                                           LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED SPEED AND ALTITUDE
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1332                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - TOMATOES                                  TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             ELEVATION-AREA BEING TREATED-FEET -  300
          PROCEDURE TURNAROUND - THIRD 1/3 TURN
        REMARKS- MAIN ROTORS SEVERED TAIL BOOM.
```

## Aircraft

- Registration: [N933B](https://openairdocs.org/deregistered/N933B-2017-06-30), registration cancelled 2017-06-30, S/N 662 (OpenAirDocs)
- Reported make and model: BELL 47G
- Registry model: [Bell 47G](https://openairdocs.org/model/bell-47g) (registry code 1181002) (OpenAirDocs)
- Registry engine: [Franklin 6V4 series](https://openairdocs.org/engine/franklin-6v4-series) (registry code 27033, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Mesa Del Rey

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19750820028299A](https://openairdocs.org/incident/19750820028299A), Aug 20, 1975: Bell 47G, King City, CA, Substantial damage. Main rotors severed tail boom.

## Other investigations on N933B (1)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB FTW94LA166](https://openairdocs.org/ntsb/FTW94LA166), May 18, 1994: Bell 47G (N933B), Sulphur, OK, substantial damage. Probable cause: THE LOSS OF ENGINE POWER DUE TO THE FAILURE OF AN ENGINE ACCESSORY OIL PUMP GEAR. A FACTOR WAS THE LACK OF SUITABLE TERRAIN FOR THE AUTOROTATION.

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

---
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.