# NTSB ANC75DAD06: Hiller Acft UH-12E, N107HA, Ketchikan, AK, May 12, 1975

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 12, 1975
- Place: Ketchikan, AK · KETCHIKAN, AK
- Location: 55.3571° N, 131.6746° W: Placed by OpenAirDocs: center of Ketchikan, AK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=55.3571&lon=-131.6746&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report June 6, 1975
- Report: Brief approved by the director
- NTSB case key (mKey): 132978
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=ANC75DAD06
- Page: https://openairdocs.org/ntsb/ANC75DAD06

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0914  75/5/12  NR.KETCHIKAN,AK       HILLER ACFT UH-12E  CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 26, 2501
        TIME - 2050                    N107HA              PX-  0  0  2  AIR TAXI-PASSG            TOTAL HOURS, 1035 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          NORTH SHOAL COVE,AK        KETCHIKAN,AK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- NR 4 CONROD FAILED. HIGH TIME ENG.
```

## Aircraft

- Registration: [N107HA](https://openairdocs.org/deregistered/N107HA-2018-03-19), registration cancelled 2018-03-19, S/N HA3007, built 1974 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Allison 250 series](https://openairdocs.org/engine/allison-250-series) (registry code 03014, turbo-prop) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## 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 19750512010279A](https://openairdocs.org/incident/19750512010279A), May 12, 1975: Hiller UH12E, Ketchikan, AK, Substantial damage. Nr 4 conrod failed. High time eng.

## Other investigations on N107HA (1)

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.

- [NTSB ERA14LA361](https://openairdocs.org/ntsb/ERA14LA361), Jul 26, 2014: Hiller UH 12E (N107HA), Wadesboro, NC, substantial damage. Probable cause: A partial loss of engine power due to the failure of the No. 2 engine accessory gearbox bearing for reasons that could not be determined based on the available information.

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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