# NTSB LAX74FUM12: Hiller Acft UH-12E, N9770C, Brawley, CA, November 19, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: November 19, 1973
- Place: Brawley, CA · BRAWLEY, CA
- Location: 32.9785° N, 115.5286° W: Placed by OpenAirDocs: center of Brawley, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=32.9785&lon=-115.5286&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 19, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 187831
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=LAX74FUM12
- Page: https://openairdocs.org/ntsb/LAX74FUM12

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3869  73/11/19 NR.BRAWLEY,CALIF      HILLER ACFT UH-12E  CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 29, 2100
        TIME - 1645                    N9770C              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 300 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
         BRAWLEY,CALIF                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SWATH RUN
           NOSE OVER/DOWN                                           LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: MASTER AND CONNECTING RODS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           TERRAIN - WET,SOFT GROUND
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - LOAD NOT JETTISONED
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 1000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - LETTUCE                                   TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    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 -  *ERROR-INVALID CODE*SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - THIRD 1/3 TURN
        REMARKS- UPPER CONROD CAP BOLT NR 6 ROD FAILED.
```

## Aircraft

- Registration: [N9770C](https://openairdocs.org/deregistered/N9770C-1993-07-29), registration cancelled 1993-07-29, S/N 2160 (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)
- 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 19731119037319A](https://openairdocs.org/incident/19731119037319A), Nov 19, 1973: Hiller UH12E, Brawley, CA, Substantial damage. Upper conrod cap bolt nr 6 rod failed.

## Other investigations on N9770C (6)

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 LAX83LA360](https://openairdocs.org/ntsb/LAX83LA360), Jul 27, 1983: Hiller 12E (N9770C), Los Banos, CA, destroyed
- [NTSB LAX80DVA22](https://openairdocs.org/ntsb/LAX80DVA22), Mar 8, 1980: Hiller UH-12E (N9770C), Merced, CA, substantial damage
- [NTSB OAK76FVM47](https://openairdocs.org/ntsb/OAK76FVM47), Sep 10, 1976: Hiller Acft UH-12E (N9770C), Salinas, CA, substantial damage
- [NTSB OAK75FVM27](https://openairdocs.org/ntsb/OAK75FVM27), Apr 17, 1975: Hiller Acft UH-12E (N9770C), King City, CA, substantial damage
- [NTSB ANC67A0065](https://openairdocs.org/ntsb/ANC67A0065), Jun 22, 1967: Hiller Acft UH12E4 (N9770C), Eagle, AK, substantial damage
- [NTSB ANC66A0048](https://openairdocs.org/ntsb/ANC66A0048), Jun 7, 1966: Hiller UH-12E (N9770C), Fairbanks, AK, 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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