# NTSB FTW65A0082: Lockheed L-188, N111, Okarche, OK, February 15, 1965

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 15, 1965
- Place: Okarche, OK · OKARCHE, OK
- Location: 35.7249° N, 97.9757° W: Placed by OpenAirDocs: center of Okarche, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.7249&lon=-97.9757&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report April 6, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 180509
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW65A0082
- Page: https://openairdocs.org/ntsb/FTW65A0082

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0062  65/2/15  NR.OKARCHE OKLA       LOCKHEED L-188      CR-  0  0  4  INSTRUCTIONAL             AIRLINE TRANSPORT, AGE
        TIME - 1030                    N111                PX-  0  0  0  TRAINING                  UNK/NR, 8941 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            135 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           PROPELLER/ROTOR FAILURE: PROPELLER                       IN FLIGHT: OTHER
        PROBABLE CAUSE(S)
          PERSONNEL-MFR DEFECT IN PROP CAUSED FATIGUE.
           PERSONNEL - PRODUCTION-DESIGN-PERSONNEL: SUBSTANDARD QUALITY CONTROL
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - SEPARATION IN FLIGHT
```

## Aircraft

- Registration: N111 (not matched to a registry record)
- Reported make and model: LOCKHEED L-188
- Category: Airplane
- Engines: turbo prop
- 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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