# NTSB LAX76FUM16: Hiller Acft UH-12B, N57U, San Diego, CA, December 16, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 16, 1975
- Place: San Diego, CA · SAN DIEGO, CA
- Location: 32.7153° N, 117.1573° W: Placed by OpenAirDocs: center of San Diego, CA, within about 10 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.7153&lon=-117.1573&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report January 22, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 151719
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX76FUM16
- Page: https://openairdocs.org/ntsb/LAX76FUM16

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3723  75/12/16 NR.SAN DIEGO,CA       HILLER ACFT UH-12B  CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 28, 760
        TIME - 0705                    N57U                PX-  0  0  1  FERRY                     TOTAL HOURS, 28 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - GOLDEN STATE HELO
        DEPARTURE POINT             INTENDED DESTINATION
          GOLDEN STATE HELIPAD        BROWN FIELD
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           NOSE OVER/DOWN                                           LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE INSPECTION OF AIRCRAFT (MAINTENANCE PERSONNEL)
        FACTOR(S)
           TERRAIN - WET,SOFT GROUND
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- CLUTCH FAILED.
```

## Aircraft

- Registration: [N57U](https://openairdocs.org/aircraft/N57U), registered now, S/N 286 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12B
- Registry model: [Hiller UH-12A](https://openairdocs.org/model/hiller-uh-12a) (registry code 4360104) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Golden State Helo

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19751216039439A](https://openairdocs.org/incident/19751216039439A), Dec 16, 1975: Hiller UH12C, San Diego, CA, Substantial damage. Clutch failed.

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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