# NTSB LAX74DUG31: Bell 47G-5, N4741R, La Verne, CA, November 30, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 30, 1973
- Place: La Verne, CA · LA VERNE, CA
- Location: 34.1205° N, 117.7699° W: Placed by OpenAirDocs: center of La Verne, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1205&lon=-117.7699&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report February 7, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187543
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74DUG31
- Page: https://openairdocs.org/ntsb/LAX74DUG31

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3823  73/11/30   LA VERNE,CALIF      BELL 47G-5          CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1626                    N4741R              PX-  0  0  0  DUAL                      AGE 47, 6542 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            5384 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - BRACKETT FIELD
        DEPARTURE POINT             INTENDED DESTINATION
          LA VERNE,CALIF              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ROLL OVER                                                LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           COPILOT - SELECTED UNSUITABLE TERRAIN
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
           AIRPORTS/AIRWAYS/FACILITIES - AIRPORT CONDITIONS: OTHER
        REMARKS- PRACTICE AUTOROTATION.LND IN SOFT AREA.
```

## Aircraft

- Registration: [N4741R](https://openairdocs.org/aircraft/N4741R), registered now, S/N 7917 (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
- Airport: Brackett Field

## 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 19731130038249A](https://openairdocs.org/incident/19731130038249A), Nov 30, 1973: Bell 47G5, La Verne, CA, Substantial damage. Practice autorotation. Lnd in soft area.

## Other investigations on N4741R (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 LAX06CA180](https://openairdocs.org/ntsb/LAX06CA180), May 23, 2006: Bell 47-G5 (N4741R), Soledad, CA, substantial damage. Probable cause: fuel exhaustion due to the pilot's inaccurate fuel consumption calculations and failure to refuel the helicopter which resulted in a loss of engine power.

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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