# NTSB SEA77DYM18: Hiller Acft UH12D, N14490, Pendleton, OR, January 27, 1977

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 27, 1977
- Place: Pendleton, OR · PENDLETON, OR
- Location: 45.6756° N, 118.8195° W: Placed by OpenAirDocs: center of Pendleton, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.6756&lon=-118.8195&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report March 16, 1977
- Report: Brief approved by the director
- NTSB case key (mKey): 157691
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA77DYM18
- Page: https://openairdocs.org/ntsb/SEA77DYM18

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0482  77/1/27    PENDLETON,OR        HILLER ACFT UH12D   CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 31, 3065
        TIME - 1600                    N14490              PX-  0  0  1  PRACTICE                  TOTAL HOURS, 60 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          PENDLETON,OR                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - LOOSE,PART/FITTING
        EMERGENCY CIRCUMSTANCES - PRECAUTIONARY LANDING OFF AIRPORT
                                  DIRECTIONAL CONTROL PROBLEM
        REMARKS- DIR CTL PROB & VIB 20FT-20KTS.TWO OF FOUR T/R GEAR BOX MOUNTING BOLTS WERE LOOSE.HIT T/R DRG T/D.
```

## Aircraft

- Registration: [N14490](https://openairdocs.org/deregistered/N14490-2018-01-11), registration cancelled 2018-01-11, S/N 1003, built 1957 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH12D
- Registry model: [Hiller UH-12D](https://openairdocs.org/model/hiller-uh-12d) (registry code 4360118) (OpenAirDocs)
- Registry engine: [Lycoming 0-435](https://openairdocs.org/engine/lycoming-0-435) (registry code 41516, reciprocating) (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 19770127002399A](https://openairdocs.org/incident/19770127002399A), Jan 27, 1977: Hiller UH12D, Pendleton, OR, Substantial damage. Dir ctl prob & vib 20FT-20KTS.two of four t/r gear box mounting bolts were loose. Hit t/r drg t/d.

## Other investigations on N14490 (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 LAX89LA169](https://openairdocs.org/ntsb/LAX89LA169), Apr 14, 1989: Hiller UH-12D (N14490), Bolinas, CA, substantial damage. Probable cause: THE PILOT'S POOR PREFLIGHT PLANNING IN THAT HE DID NOT ACCURATELY ACCOUNT FOR THE FUEL ON BOARD THE AIRCRAFT AS A BASIS FOR FUEL CONSUMPTION CALCULATIONS THEREBY CAUSING THE ENGINE TO STOP PRODUCING…

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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