# NTSB OAK69D0080: Hiller UH-12B, N5301V, Centerville, CA, August 1, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 1, 1968
- Place: Centerville, CA · CENTERVILLE, CA
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 9, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 109354
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK69D0080
- Page: https://openairdocs.org/ntsb/OAK69D0080

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2596   68/8/1    CENTERVILLE,CALIF   HILLER UH-12B       CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 42, 6107
        TIME - 0445                    N5301V              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 5607 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - AG STRIP
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: EN ROUTE TO TREAT CROP
           HARD LANDING                                             LANDING: POWER-OFF AUTOROTATIVE LANDING
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS - FOREIGN MATERIAL AFFECTING NORMAL OPERATIONS
           PILOT IN COMMAND - IMPROPER OPERATION OF FLIGHT CONTROLS
        FACTOR(S)
           TERRAIN - WET,SOFT GROUND
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 5000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - CORN                                      TYPE OF CHEMICAL USED - LIQUID CHEMICAL-NONTOXIC
          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                                 ELEVATION-AREA BEING TREATED-FEET -  1000
          SWATH RUN-HOW FLOWN - WIND CALM
        REMARKS- CARB HEAT AIR INTAKE GATES PN761853 FAILED.PARTICLES ENTERED ENG,BLOCKED INTAKE VALVE CLOSURE.
```

## Aircraft

- Registration: N5301V (not matched to a registry record)
- Reported make and model: HILLER UH-12B
- Category: Helicopter
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ag Strip

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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