# NTSB MIA79DLG29: Hiller UH-12E, N121NR, Timmonsville, SC, August 20, 1979

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: August 20, 1979
- Place: Timmonsville, SC · TIMMONSVILLE, SC
- Location: 34.1329° N, 79.9403° W: Placed by OpenAirDocs: center of Timmonsville, SC, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=34.1329&lon=-79.9403&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 9, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 134741
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MIA79DLG29
- Page: https://openairdocs.org/ntsb/MIA79DLG29

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2052  79/8/20    TIMMONSVILLE,SC     HILLER UH-12E       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 38, 8160
        TIME - 1130                    N121NR              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 188 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          TIMMONSVILLE,SC             LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLIDED WITH: WIRES/POLES                               IN FLIGHT: SWATH RUN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - MISJUDGED CLEARANCE
        FACTOR(S)
           WEATHER - DOWNDRAFT,UPDRAFTS
        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                  TEMPERATURE-F
          NONE                                                      90
        WIND DIRECTION-DEGREES                                   WIND VELOCITY-KNOTS
          270                                                       5
        TYPE OF WEATHER CONDITIONS                               TYPE OF FLIGHT PLAN
          VFR                                                      NONE
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 8160                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - BEANS                                     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 - BELLY                             TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  149                 SWATH RUN-HOW FLOWN - UPWIND
         FIRE AFTER IMPACT
        REMARKS- PIC FLEW UNDER POWER LINES.
```

## Aircraft

- Registration: [N121NR](https://openairdocs.org/deregistered/N121NR-2012-11-14), registration cancelled 2012-11-14, S/N 1594, built 1964 (OpenAirDocs)
- Reported make and model: HILLER UH-12E
- Registry model: [Hiller UH-12E](https://openairdocs.org/model/hiller-uh-12e) (registry code 4360122) (OpenAirDocs)
- Registry engine: [Amateur-built UNKNOWN ENG](https://openairdocs.org/engine/amateur-built-unknown-eng) (registry code 99999) (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 19790820019749A](https://openairdocs.org/incident/19790820019749A), Aug 20, 1979: Hiller UH12E, Timmonsville, SC, Substantial damage. Pilot said small whirlwind hit helicopter as it passed under wires during spray run, forcing it into wires.

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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