# NTSB UNK64X3141: Bell 47G3B, N2776, Montague, CA, July 31, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 31, 1964
- Place: Montague, CA · MONTAGUE, CA
- Location: 41.7271° N, 122.5305° W: Placed by OpenAirDocs: center of Montague, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.7271&lon=-122.5305&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report January 15, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 182696
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X3141
- Page: https://openairdocs.org/ntsb/UNK64X3141

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0721  64/7/31  NR.MONTAGUE CALIF     BELL 47G3B          CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 1610                    N2776               PX-  0  0  2  TEST                      AGE 24, 2860 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            80 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - SISKIYOU COUNTY
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: VERTICAL
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PWR PLT-FAILURE OF TURBO SUPERCHARGER
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
```

## Aircraft

- Registration: N2776 (not matched to a registry record)
- Reported make and model: BELL 47G3B
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Siskiyou County

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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