# NTSB MKC68F0238: Piper PA-25, N6011Z, Maryville, MO, June 29, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 29, 1967
- Place: Maryville, MO · MARYVILLE, MO
- Location: 40.3425° N, 94.8700° W: Placed by OpenAirDocs: center of Maryville, MO, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.3425&lon=-94.8700&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 11, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 115729
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC68F0238
- Page: https://openairdocs.org/ntsb/MKC68F0238

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3924  67/6/29    MARYVILLE,MO        PIPER PA-25         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 19, 373
        TIME - 1005                    N6011Z              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 113 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: EN ROUTE TO TREAT CROP
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           SYSTEMS - ANTI-ICING,DE-ICING SYSTEMS: CARBURETOR DE-ICING SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - JETTISONED LOAD
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SUSPECTED MECHANICAL DISCREPANCY
        REMARKS- CARBURETOR HEAT BUTTERFLY VALVE SHAFT WAS WORN AND BROKEN. VALVE IN CLOSED POSITION.
```

## Aircraft

- Registration: [N6011Z](https://openairdocs.org/deregistered/N6011Z-2013-03-26), registration cancelled 2013-03-26, S/N 25-14, built 1959 (OpenAirDocs)
- Reported make and model: PIPER PA-25
- Registry model: [Piper PA-25](https://openairdocs.org/model/piper-pa-25) (registry code 7102502) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N6011Z (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 MKC71FCG57](https://openairdocs.org/ntsb/MKC71FCG57), Apr 24, 1971: Piper PA-25 (N6011Z), Marshall, MO, 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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