# NTSB SEA81FYM25: Hiller Acft UH-12E, N99575, Milton-Freewtr, OR, May 29, 1981

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 29, 1981
- Place: Milton-Freewtr, OR · MILTON-FREEWTR, OR
- Location: 45.9340° N, 118.3910° W: Placed by OpenAirDocs: center of Milton-Freewater, OR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=45.9340&lon=-118.3910&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report August 25, 1981
- Report: Brief approved by the director
- NTSB case key (mKey): 125732
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA81FYM25
- Page: https://openairdocs.org/ntsb/SEA81FYM25

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1587  81/5/29    MILTON-FREEWTR,OR   HILLER ACFT UH-12E  CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 56, 13000
        TIME - 1230                    N99575              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, UNK/NR IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - MILTON-FREEWATER
        DEPARTURE POINT             INTENDED DESTINATION
          MILTON-FREEWTR,OR           LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           COLLIDED WITH: TREES                                     LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           TERRAIN - HIGH OBSTRUCTIONS
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 9999                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - FRUIT ORCHARDS                            TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - SIDES                             TERRAIN-TYPE -LEVEL,FLAT
          SWATH RUN-HOW FLOWN - WIND CALM                          PROCEDURE TURNAROUND - ENTRY TO PROCEDURE TURN
        REMARKS- NR 6 CONROD BOLTS FAILED.
```

## Aircraft

- Registration: [N99575](https://openairdocs.org/deregistered/N99575-2018-01-17), registration cancelled 2018-01-17, S/N 63-12859 (OpenAirDocs)
- Reported make and model: HILLER ACFT UH-12E
- Registry model: [Hiller OH-23G](https://openairdocs.org/model/hiller-oh-23g) (registry code 4360121) (OpenAirDocs)
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Milton-Freewater

## 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 19810529035939A](https://openairdocs.org/incident/19810529035939A), May 29, 1981: Hiller UH12E, Milton-Freewate, OR, Substantial damage. Helicopter crashed during attempted emergency landing after engine failure.

## Other investigations on N99575 (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 SEA78DYP44](https://openairdocs.org/ntsb/SEA78DYP44), Jul 21, 1978: Hiller Acft UH-12E (N99575), Mesa, 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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