# NTSB UNK64X2057: Waco Ykcs, N15232, Okla City, OK, May 31, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: May 31, 1964
- Place: Okla City, OK · OKLA CITY, OK
- Location: 35.4676° N, 97.5164° W: Placed by OpenAirDocs: center of Oklahoma City, OK, within about 14 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=35.4676&lon=-97.5164&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report September 28, 1964
- Report: Brief approved by the director
- NTSB case key (mKey): 183798
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK64X2057
- Page: https://openairdocs.org/ntsb/UNK64X2057

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1499  64/5/31    OKLA CITY OKLA      WACO YKCS           CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 30, 700
        TIME - 1930                    N15232              PX-  0  0  4  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 150 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           MISCELLANEOUS ACTS,CONDITIONS - FUEL CONTAMINATION-EXCLUSIVE OF WATER IN FUEL
        REMARKS- FUEL SCREEN PLUGGED WITH FOREIGN MATTER
```

## Aircraft

- Registration: [N15232](https://openairdocs.org/aircraft/N15232), registered now, S/N 4263, built 1935 (OpenAirDocs)
- Reported make and model: WACO YKCS
- Registry model: [Waco YKC-S](https://openairdocs.org/model/waco-ykc-s) (registry code 9600818) (OpenAirDocs)
- Registry engine: [Jacobs L4 /R755-7](https://openairdocs.org/engine/jacobs-l4-r755-7) (registry code 35003, 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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