# NTSB UNK64X1757: Hiller UH12L4, N977C, Hollister, CA, May 13, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 13, 1964
- Place: Hollister, CA · HOLLISTER, CA
- Location: 36.8556° N, 121.3995° W: Placed by OpenAirDocs: center of Hollister, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.8556&lon=-121.3995&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 27, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 184934
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X1757
- Page: https://openairdocs.org/ntsb/UNK64X1757

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0268  64/5/13    HOLLISTER CALIF     HILLER UH12L4       CR-  0  0  1  MISCELLANEOUS             ATP,FLIGHT INSTR., AGE
        TIME - 0800                    N977C               PX-  0  0  0  TEST                      37, 6483 TOTAL HOURS, 700
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            IN TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - HOLLISTER
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           MISCELLANEOUS                                            IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: POOR/INADEQUATE DESIGN
        FACTOR(S)
           ROTORCRAFT - ROTOR ASSEMBLIES: TAIL ROTOR BLADES
           SYSTEMS - ELECTRICAL SYSTEM: BATTERIES
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- TAIL ROTOR BLADES STRUCK TAIL BOOM DURING EXPERIMENTAL TEST FLIGHT
```

## Aircraft

- Registration: N977C (not matched to a registry record)
- Reported make and model: HILLER UH12L4
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hollister

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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