# NTSB FTW67A0056: Hiller UH-12L, N9780C, Woodville, TX, November 19, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 19, 1966
- Place: Woodville, TX · WOODVILLE, TX
- Location: 30.7744° N, 94.4225° W: Placed by OpenAirDocs: center of Woodville, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=30.7744&lon=-94.4225&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report June 15, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 120102
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW67A0056
- Page: https://openairdocs.org/ntsb/FTW67A0056

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-1108  66/11/19   WOODVILLE TEX       HILLER UH-12L       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 35, 7200
        TIME - 1400                    N9780C              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 500 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           ROTORCRAFT - TRANSMISSION ROTOR DRIVE SYSTEM: CLUTCH ASSEMBLY
          ROTORCFT-SLIPPAGE CAUSED BY GLAZED FRICTION SHOES.
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - PREVIOUS DAMAGE
           MISCELLANEOUS ACTS,CONDITIONS - OVERHEATED
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1800                       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - OTHER                                     TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          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
        REMARKS- IMPROPER CLUTCH ENGAGEMENT.
```

## Aircraft

- Registration: [N9780C](https://openairdocs.org/deregistered/N9780C-2013-05-30), registration cancelled 2013-05-30, S/N 2500, built 1964 (OpenAirDocs)
- Reported make and model: HILLER UH-12L
- Registry model: [Hiller UH-12L](https://openairdocs.org/model/hiller-uh-12l) (registry code 4360126) (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 N9780C (3)

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 LAX68A0080](https://openairdocs.org/ntsb/LAX68A0080), Feb 27, 1968: Hiller UN-12L (N9780C), Windna, AZ, substantial damage
- [NTSB DEN66A0049](https://openairdocs.org/ntsb/DEN66A0049), Dec 18, 1965: Hiller UH12L4 (N9780C), Albuquerque, NM, destroyed
- [NTSB DEN66A0041](https://openairdocs.org/ntsb/DEN66A0041), Dec 6, 1965: Hiller UH12L4 (N9780C), Albuquerque, NM, 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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