# NTSB OAK74DVD28: Bell 47G-5, N7923J, Stockton, CA, March 24, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 24, 1974
- Place: Stockton, CA · STOCKTON, CA
- Location: 37.9577° N, 121.2908° W: Placed by OpenAirDocs: center of Stockton, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9577&lon=-121.2908&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report April 29, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 186567
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK74DVD28
- Page: https://openairdocs.org/ntsb/OAK74DVD28

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0490  74/3/24  NR.STOCKTON,CALIF     BELL 47G-5          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 34, 2927
        TIME - 0730                    N7923J              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 163 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         STOCKTON,CALIF               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SWATH RUN
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - MISMANAGEMENT OF FUEL
           MISCELLANEOUS ACTS,CONDITIONS - FUEL EXHAUSTION
           PILOT IN COMMAND - IMPROPER LEVEL OFF
        FACTOR(S)
           PERSONNEL - OPERATIONAL SUPERVISORY PERSONNEL: DEFICIENCY,COMPANY MAINTAINED EQPMT,SERVICES,REGULATION
           MISCELLANEOUS ACTS,CONDITIONS - UNAPPROVED MODIFICATION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 2927                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  100                 SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- OP CHNGD TANK INSTALL ON R SIDE.DIDNT CHNG FUEL GAGE.INDICATED TOO HI READING.PLT FLEW 6 MIN ONLY.
```

## Aircraft

- Registration: [N7923J](https://openairdocs.org/deregistered/N7923J-2017-10-31), registration cancelled 2017-10-31, S/N 25040, built 1971 (OpenAirDocs)
- Reported make and model: BELL 47G-5
- Registry model: [Bell 47G-5](https://openairdocs.org/model/bell-47g-5) (registry code 1181032) (OpenAirDocs)
- Registry engine: [Lycoming VO-435 series](https://openairdocs.org/engine/lycoming-vo-435-series) (registry code 41525, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19740324006939A](https://openairdocs.org/incident/19740324006939A), Mar 24, 1974: Bell 47G5, Stockton, CA, Substantial damage. Op chngd tank install on r side. Didnt chng fuel gage. Indicated too hi reading. Plt flew 6 min only.

## Other investigations on N7923J (4)

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 LAX95LA216](https://openairdocs.org/ntsb/LAX95LA216), Jun 18, 1995: Bell 47-G5 (N7923J), Coalinga, CA, destroyed. Probable cause: clutch slippage for undetermined reasons. A factor in the accident was the helicopter's low above ground altitude, which limited the pilot's time and ability to recover main rotor rpm.
- [NTSB OAK78DVG52](https://openairdocs.org/ntsb/OAK78DVG52), Jun 21, 1978: Bell 47G5 (N7923J), Napa, CA, substantial damage
- [NTSB FTW73DRG47](https://openairdocs.org/ntsb/FTW73DRG47), Feb 2, 1973: Bell 47G-5 (N7923J), Harlingen, TX, substantial damage
- [NTSB FTW73DRG30](https://openairdocs.org/ntsb/FTW73DRG30), Dec 7, 1972: Bell 47G-5 (N7923J), Harlingen, TX, substantial damage

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.

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