# NTSB FTW66F0458: Aero Cmdr 520, N7834, Cleo Springs, OK, December 6, 1965

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 6, 1965
- Place: Cleo Springs, OK · CLEO SPRINGS, OK
- Location: 36.4049° N, 98.4400° W: Placed by OpenAirDocs: center of Cleo Springs, OK, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=36.4049&lon=-98.4400&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report February 1, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 174849
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW66F0458
- Page: https://openairdocs.org/ntsb/FTW66F0458

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3621   65/12/6   CLEO SPRINGS OKLA   AERO CMDR 520       CR-  0  0  1  NONCOMMERCIAL             COMMERCIAL, AGE 38, 1500
        TIME - 1720                    N7834               PX-  0  0  4  BUSINESS                  TOTAL HOURS, 75 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: FENCE,FENCEPOSTS                          LANDING: ROLL
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - FUEL EXHAUSTION
           POWERPLANT - FUEL SYSTEM: TANKS
           POWERPLANT - FUEL SYSTEM: VENTS,DRAINS,TANK CAPS
           MISCELLANEOUS ACTS,CONDITIONS - PINCHED
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FUEL TANK VENT LINES CLOGGED RESULTING IN COLLAPSE OF FUEL CELLS AND INACCURATE FUEL GAUGE READING
```

## Aircraft

- Registration: [N7834](https://openairdocs.org/deregistered/N7834-2013-06-14), registration cancelled 2013-06-14, S/N 520-92, built 1953 (OpenAirDocs)
- Reported make and model: AERO CMDR 520
- Registry model: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202) (OpenAirDocs)
- Registry engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N7834 (2)

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 MIA84LA227](https://openairdocs.org/ntsb/MIA84LA227), Aug 14, 1984: Aero Commander 520 (N7834), Stuart, FL, substantial damage
- [NTSB CHI67F0641](https://openairdocs.org/ntsb/CHI67F0641), Apr 3, 1967: Aero Comdr 520 (N7834), Rockford, IL, 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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