# NTSB UNK64X4045: Boeing 75N1, N79536, Lepanto, AR, September 19, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: September 19, 1964
- Place: Lepanto, AR · LEPANTO, AR
- Location: 35.6085° N, 90.3330° W: Placed by OpenAirDocs: center of Lepanto, AR, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.6085&lon=-90.3330&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 9, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 181209
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X4045
- Page: https://openairdocs.org/ntsb/UNK64X4045

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2949  64/9/19    LEPANTO ARK         BOEING 75N1         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 650
        TIME - 1700                    N79536              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 64 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: SWATH RUN
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CRANKSHAFT
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -  119                       KIND OF OPERATION - DEFOLIATION (DUST)
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - DRY CHEMICAL-NONTOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - NOT INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  230                 SWATH RUN-HOW FLOWN - CROSSWIND
        REMARKS- CRANKSHAFT FAILED NEXT TO FRONT THRUST BEARING.
```

## Aircraft

- Registration: [N79536](https://openairdocs.org/deregistered/N79536-2017-09-26), registration cancelled 2017-09-26, S/N 75-3516, built 1942 (OpenAirDocs)
- Reported make and model: BOEING 75N1
- Registry model: [Boeing A75N1(PT17)](https://openairdocs.org/model/boeing-a75n1-pt17) (registry code 1380134) (OpenAirDocs)
- Registry engine: [Lycoming R680-4P-B4](https://openairdocs.org/engine/lycoming-r680-4p-b4) (registry code 41542, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: 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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