# NTSB UNK64X4038: Hiller UH12L, N5370V, Palo Alto, CA, September 18, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 18, 1964
- Place: Palo Alto, CA · PALO ALTO, CA
- Location: 37.3965° N, 122.1431° W: Placed by OpenAirDocs: center of Palo Alto, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.3965&lon=-122.1431&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 18, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 181804
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X4038
- Page: https://openairdocs.org/ntsb/UNK64X4038

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0842  64/9/18    PALO ALTO CALIF     HILLER UH12L        CR-  0  0  2  MISCELLANEOUS             COMMERCIAL, FL.INSTR.,
        TIME - 0808                    N5370V              PX-  0  0  0  TEST                      AGE 41, 11400 TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, 120 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - HILLER
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
          PILOT-IMPROPERLY EXECUTED AUTOROTATIVE LANDING
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SIMULATED CONDITIONS
        REMARKS- EXPERIMENTAL TEST FLIGHT
```

## Aircraft

- Registration: N5370V (not matched to a registry record)
- Reported make and model: HILLER UH12L
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Hiller

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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