# NTSB UNK64X1689: Bell 47D-1, N9421H, Fullerton, CA, May 9, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 9, 1964
- Place: Fullerton, CA · FULLERTON, CA
- Location: 33.8857° N, 117.9280° W: Placed by OpenAirDocs: center of Fullerton, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.8857&lon=-117.9280&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 15, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 184879
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X1689
- Page: https://openairdocs.org/ntsb/UNK64X1689

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0136   64/5/9  NR.FULLERTON CALIF    BELL 47D-1          CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1300                    N9421H              PX-  0  0  0  DUAL                      AGE 26, 346 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            132 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  IN FLIGHT: HOVERING
        PROBABLE CAUSE(S)
           DUAL STUDENT - IMPROPER OPERATION OF FLIGHT CONTROLS
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
```

## Aircraft

- Registration: [N9421H](https://openairdocs.org/aircraft/N9421H), registered now, S/N 178, built 1950 (OpenAirDocs)
- Reported make and model: BELL 47D-1
- Registry model: [Bell 47D1](https://openairdocs.org/model/bell-47d1) (registry code 1180802) (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

## Other investigations on N9421H (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 LAX78FVA25](https://openairdocs.org/ntsb/LAX78FVA25), Feb 18, 1978: Bell 47G1 (N9421H), Buttonwillow, CA, 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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