# NTSB SEA76FYC45: Hiller Acft UH-12E, N9785C, Tillamook, OR, May 14, 1976

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: May 14, 1976
- Place: Tillamook, OR · TILLAMOOK, OR
- Location: 45.4561° N, 123.8331° W: Placed by OpenAirDocs: center of Tillamook, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.4561&lon=-123.8331&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report July 15, 1976
- Report: Brief approved by the director
- NTSB case key (mKey): 153652
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA76FYC45
- Page: https://openairdocs.org/ntsb/SEA76FYC45

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1890  76/5/14  NR.TILLAMOOK,OR       HILLER ACFT UH-12E  CR-  0  1  0  COMMERCIAL                COMMERCIAL, FL.INSTR.,
        TIME - 0800                    N9785C              PX-  0  0  0  AERIAL APPLICATION        AGE 26, 3454 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            99 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         TILLAMOOK,OR                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: MANEUVER TO AVOID OBSTRUCTION
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           MISCELLANEOUS - EVASIVE MANEUVER TO AVOID COLLISION
           TERRAIN - HIGH OBSTRUCTIONS
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  100                       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          CRASH BAR - INSTALLED                                    TANK/HOPPER-LOCATION - SIDES
          TERRAIN-TYPE -MOUNTAINOUS                                ELEVATION-AREA BEING TREATED-FEET -  1600
          SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- SPRAYING,LOST RPM WHILE MANEUVERING ARND TALL TREE,SETTLED,STRUCK T/R,ENTERED SPIN,ROLLED DN HILL.
```

## Aircraft

- Registration: [N9785C](https://openairdocs.org/aircraft/N9785C), registered now, S/N 2269 (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: Destroyed

## 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 19760514015839A](https://openairdocs.org/incident/19760514015839A), May 14, 1976: Hiller UH12E, Tillamook, OR, Substantial damage. Spraying,lost RPM while maneuvering arnd tall tree,settled,struck t/r,entered spin,rolled dn hill.

## Other investigations on N9785C (4)

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 SEA04LA073](https://openairdocs.org/ntsb/SEA04LA073), Apr 26, 2004: Hiller UH-12E (N9785C), Haines, OR, substantial damage. Probable cause: A momentary partial loss of power for undetermined reason(s) and the pilot's failure to maintain adequate RPM during his autorotation landing.
- [NTSB SEA93LA181](https://openairdocs.org/ntsb/SEA93LA181), Aug 23, 1993: Hiller UH-12E (N9785C), Auburn, WA, substantial damage. Probable cause: FAILURE OF THE CONNECTING ROD BOLT. THE HIGH VEGETATION WAS A FACTOR.
- [NTSB SEA66A0066](https://openairdocs.org/ntsb/SEA66A0066), Jun 13, 1966: Hiller UH-12E (N9785C), Huntington, OR, substantial damage
- [NTSB UNK64X1354](https://openairdocs.org/ntsb/UNK64X1354), Apr 17, 1964: Hiller 12E (N9785C), Pomeroy, WA, 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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