# NTSB LAX71DUJ15: Hiller Acft SL-4, N9728C, Williams, AZ, July 21, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 21, 1970
- Place: Williams, AZ · WILLIAMS, AZ
- Location: 35.2495° N, 112.1910° W: Placed by OpenAirDocs: center of Williams, AZ, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.2495&lon=-112.1910&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report August 27, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 107693
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX71DUJ15
- Page: https://openairdocs.org/ntsb/LAX71DUJ15

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4232  70/7/21    WILLIAMS,ARIZ       HILLER ACFT SL-4    CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 40, 8000
        TIME - 0800                    N9728C              PX-  0  0  2  AIR TAXI-PASSG            TOTAL HOURS, 3000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          KENDRICK MT BASE            LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: OBJECT                                    LANDING: POWER-ON LANDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OBJECTS OR OBSTRUCTIONS
        FACTOR(S)
           PILOT IN COMMAND - EXERCISED POOR JUDGMENT
        REMARKS- PLT SAID HE LNDD TOO CLOSE TO PICKUP TRUCK,FAILED TO NOTICE WHIP ANTENNA.M/R BLADE HIT ANTENNA.
```

## Aircraft

- Registration: [N9728C](https://openairdocs.org/deregistered/N9728C-1989-07-20), registration cancelled 1989-07-20, S/N 2511 (OpenAirDocs)
- Reported make and model: HILLER ACFT SL-4
- Registry model: [Hiller UH-12L4](https://openairdocs.org/model/hiller-uh-12l4) (registry code 4360128) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: 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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