# NTSB OAK78DVA82: Hiller UH12E, N102EH, Tuolumne, CA, September 12, 1978

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 12, 1978
- Place: Tuolumne, CA · TUOLUMNE, CA
- Location: 37.9608° N, 120.2374° W: Placed by OpenAirDocs: center of Tuolumne, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.9608&lon=-120.2374&mi=10
- Phase of flight: [Takeoff](https://openairdocs.org/ntsb-phases/300) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 17, 1978
- Report: Brief approved by the director
- NTSB case key (mKey): 139586
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK78DVA82
- Page: https://openairdocs.org/ntsb/OAK78DVA82

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2516  78/9/12    TUOLUMNE,CA         HILLER UH12E        CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 33, 6550
        TIME - 0700                    N102EH              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          TUOLUMNE,CA                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH GROUND/WATER: CONTROLLED                  TAKEOFF: VERTICAL
           ROLL OVER                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M.
        FACTOR(S)
           WEATHER - HIGH DENSITY ALTITUDE
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          CLEAR                                                    UNLIMITED
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          5 OR OVER(UNLIMITED)                                     NONE
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  TYPE OF WEATHER CONDITIONS
          NONE                                                     VFR
        TYPE OF FLIGHT PLAN
          NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 5000                       KIND OF OPERATION - SPRAYING FORESTS
          KIND OF CROP - FOREST-TREES                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          GLOVES - NOT USED                                        GOGGLES - NOT USED
          CRASH HELMET - AVAILABLE-NOT USED                        COCKPIT CRASHPAD - NOT INSTALLED
          CRASH BAR - NOT INSTALLED                                TANK/HOPPER-LOCATION - SIDES
          TERRAIN-TYPE -MOUNTAINOUS
        REMARKS- PILOT FAILED TO ACHIEVE TRANSLATIONAL LIFT. DA APPROX 5900FT.
```

## Aircraft

- Registration: [N102EH](https://openairdocs.org/deregistered/N102EH-2012-07-19), registration cancelled 2012-07-19, S/N HA3025, built 1975 (OpenAirDocs)
- Reported make and model: HILLER UH12E
- 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

## 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 19780912027619A](https://openairdocs.org/incident/19780912027619A), Sep 12, 1978: Hiller UH12E, Tuolumne, CA, Substantial damage. Pilot failed to achieve translational lift. Da approx 5900FT.

## Other investigations on N102EH (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 SEA7LDYE16](https://openairdocs.org/ntsb/SEA7LDYE16), Sep 15, 1975: Hiller Acft UH-12E (N102EH), Randle, WA, destroyed

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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