# NTSB FTW71DPJ31: Boeing A75, N50536, Chickasha, OK, March 15, 1971

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: March 15, 1971
- Place: Chickasha, OK · CHICKASHA, OK
- Location: 35.0405° N, 97.9472° W: Placed by OpenAirDocs: center of Chickasha, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.0405&lon=-97.9472&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report December 16, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 160551
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW71DPJ31
- Page: https://openairdocs.org/ntsb/FTW71DPJ31

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1040  71/3/15    CHICKASHA,OKLA      BOEING A75          CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 28, 1852
        TIME - 1545                    N50536              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 1400 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - CHICKASHA
        DEPARTURE POINT             INTENDED DESTINATION
          CHICKASHA,OKLA              LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: EN ROUTE TO RELOADING AREA
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - INADEQUATE PREFLIGHT PREPARATION AND/OR PLANNING
           PILOT IN COMMAND - MISMANAGEMENT OF FUEL
           MISCELLANEOUS ACTS,CONDITIONS - MISCALCULATED FUEL CONSUMPTION
           MISCELLANEOUS ACTS,CONDITIONS - FUEL EXHAUSTION
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL -   77                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 GLOVES - USED
          GOGGLES - USED                                           CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT
        REMARKS- SPRAYING METHEL STAUFFER PARATHION.
```

## Aircraft

- Registration: [N50536](https://openairdocs.org/aircraft/N50536), registered now, S/N 75-1462, built 1941 (OpenAirDocs)
- Reported make and model: BOEING A75
- Registry model: [Boeing A75](https://openairdocs.org/model/boeing-a75) (registry code 1380108) (OpenAirDocs)
- Registry engine: [Pratt & Whitney R-985 series](https://openairdocs.org/engine/pratt-whitney-r-985-series) (registry code 52008, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Chickasha

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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