# NTSB FTW67F0186: Piper PA-25, N6436Z, Pawnee, TX, August 26, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: August 26, 1966
- Place: Pawnee, TX · PAWNEE, TX
- Location: 28.6483° N, 98.0083° W: Placed by OpenAirDocs: center of Pawnee, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=28.6483&lon=-98.0083&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report October 20, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 122233
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW67F0186
- Page: https://openairdocs.org/ntsb/FTW67F0186

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2288  66/8/26    PAWNEE TEX          PIPER PA-25         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 35, 1538
        TIME - 1740                    N6436Z              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 75 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           HARD LANDING                                             LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - IGNITION SYSTEM: HIGH TENSION WIRING
           MISCELLANEOUS ACTS,CONDITIONS - GROUNDED
           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 -  895                       KIND OF OPERATION - DEFOLIATION (LIQUID)
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - NOT USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - NOT INSTALLED                         CRASH BAR - INSTALLED
        REMARKS- NUMBER 2 CYLINDER LOWER SPARK PLUG WIRE BURNED AND GROUNDED BY CONTACT WITH EXHAUST MANIFOLD.
```

## Aircraft

- Registration: [N6436Z](https://openairdocs.org/deregistered/N6436Z-2014-11-12), registration cancelled 2014-11-12, S/N 25-592, built 1961 (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 N6436Z (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 FTW79DPJ22](https://openairdocs.org/ntsb/FTW79DPJ22), May 28, 1979: Piper PA-25 (N6436Z), Perkins, OK, substantial damage
- [NTSB FTW78DPJ12](https://openairdocs.org/ntsb/FTW78DPJ12), Mar 26, 1978: Piper PA-25 (N6436Z), Cashion, OK, 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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