# NTSB UNK65X0456: Bell 47B3G, N11H, Ontario, CA, October 27, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 27, 1964
- Place: Ontario, CA · ONTARIO, CA
- Location: 34.0633° N, 117.6509° W: Placed by OpenAirDocs: center of Ontario, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.0633&lon=-117.6509&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 5, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 181795
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK65X0456
- Page: https://openairdocs.org/ntsb/UNK65X0456

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0822  64/10/27   ONTARIO CALIF       BELL 47B3G          CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 42, 399
        TIME - 1145                    N11H                PX-  0  0  1  PRACTICE                  TOTAL HOURS, 62 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - ONTARIO INTL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PILOT-IMPROPERLY EXECUTED AUTOROTATIVE LANDING
        FACTOR(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
           PILOT IN COMMAND - MISJUDGED ALTITUDE
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
```

## Aircraft

- Registration: N11H (not matched to a registry record)
- Reported make and model: BELL 47B3G
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ontario Intl

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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