# NTSB ANC73AA004: Hiller Acft UH-12E, N5337V, Umiat, AK, July 7, 1972

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: July 7, 1972
- Place: Umiat, AK · UMIAT, AK
- Location: 69.3669° N, 152.1442° W: Placed by OpenAirDocs: center of Umiat, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=69.3669&lon=-152.1442&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 24, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 167156
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC73AA004
- Page: https://openairdocs.org/ntsb/ANC73AA004

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1256   72/7/7    UMIAT,ALAS          HILLER ACFT UH-12E  CR-  0  0  1  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0900                    N5337V              PX-  0  0  0  AIR TAXI-CARGO            AGE 35, 3748 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            1413 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - UMIAT
        DEPARTURE POINT             INTENDED DESTINATION
          UMIAT,ALAS                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: POWER-ON DESCENT
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - CHAFED
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
           MISCELLANEOUS ACTS,CONDITIONS - AIRCRAFT CAME TO REST IN WATER
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- NR 3 CONROD AND CAP FAILED DUE FRETTING.PLT DROPPED SLING LOAD,HAD TO LND IN POND.
```

## Aircraft

- Registration: N5337V (not matched to a registry record)
- Reported make and model: HILLER ACFT UH-12E
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Umiat

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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