# NTSB SEA78FYM06: Hiller Acft UH-12E, N9786C, Depoe Bay, OR, November 3, 1977

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: November 3, 1977
- Place: Depoe Bay, OR · DEPOE BAY, OR
- Location: 44.8091° N, 124.0597° W: Placed by OpenAirDocs: center of Depoe Bay, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.8091&lon=-124.0597&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report January 31, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 144187
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA78FYM06
- Page: https://openairdocs.org/ntsb/SEA78FYM06

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3885   77/11/3   DEPOE BAY,OR        HILLER ACFT UH-12E  CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 1000                    N9786C              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   AGE 48, 11353 TOTAL
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            HOURS, 4235 IN TYPE,
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DEPOE BAY,OR                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: TAIL ROTOR                      IN FLIGHT: RETURN TO STRIP
           COLLIDED WITH: TREES                                     IN FLIGHT: AUTOROTATIVE DESCENT
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: TAIL ROTOR GEAR BOX
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           TERRAIN - HIGH OBSTRUCTIONS
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 4235                       KIND OF OPERATION - FERTILIZING (DUST)
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - DRY CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -MOUNTAINOUS
          ELEVATION-AREA BEING TREATED-FEET -  850
        REMARKS- T/R GEAR BOX THRUST BRGS MISALIGNED,IMPROPERLY INSTALLED.INPUT CPLNG DISENGAGED FM T/R DRIVETRAIN.
```

## Aircraft

- Registration: [N9786C](https://openairdocs.org/deregistered/N9786C-2015-04-30), registration cancelled 2015-04-30, S/N 2267, built 1963 (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: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534, reciprocating) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N9786C (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 ANC66A0049](https://openairdocs.org/ntsb/ANC66A0049), Jun 21, 1966: Hiller UH12EL (N9786C), Dillingham, AK, 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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