# NTSB FTW66F0586: Boeing E-75, N5269N, Medford, OK, March 31, 1966

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: March 31, 1966
- Place: Medford, OK · MEDFORD, OK
- Location: 36.8034° N, 97.7382° W: Placed by OpenAirDocs: center of Medford, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.8034&lon=-97.7382&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report April 22, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 172514
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW66F0586
- Page: https://openairdocs.org/ntsb/FTW66F0586

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0541  66/3/31    MEDFORD OKLA        BOEING E-75         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 47, 8500
        TIME - 1610                    N5269N              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 7500 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: EN ROUTE TO TREAT CROP
           COLLIDED WITH: WIRES/POLES                               LANDING: FINAL APPROACH
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: BLOWER,IMPELLER ASSEMBLY
           MISCELLANEOUS ACTS,CONDITIONS - MISSING
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 7500                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - GRAIN FIELDS                              TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT 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 -  2600
        REMARKS- IMPELLER NUT P/N 30604 MISSING FROM IMPELLER SHAFT ALLOWING EXCESSIVE OIL INTO INDUCTION SYSTEM
```

## Aircraft

- Registration: [N5269N](https://openairdocs.org/deregistered/N5269N-1982-04-23), registration cancelled 1982-04-23, S/N 755287 (OpenAirDocs)
- Reported make and model: BOEING E-75
- Registry model: [Boeing E75](https://openairdocs.org/model/boeing-e75) (registry code 1380120) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N5269N (1)

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 MKC79FER46](https://openairdocs.org/ntsb/MKC79FER46), May 23, 1978: Boeing E-75 (N5269N), Perham, MN, destroyed

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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