# NTSB FTW67F0081: Piper PA-25, N6527Z, Agua Dulce, TX, June 28, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 28, 1966
- Place: Agua Dulce, TX · AGUA DULCE, TX
- Location: 27.7827° N, 97.9099° W: Placed by OpenAirDocs: center of Agua Dulce, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=27.7827&lon=-97.9099&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report September 12, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 170927
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW67F0081
- Page: https://openairdocs.org/ntsb/FTW67F0081

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1865  66/6/28    AGUA DULCE TEX      PIPER PA-25         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 38, 7000
        TIME - 1100                    N6527Z              PX-  0  0  0  AERIAL APPLICATION        TOTAL HOURS, 1000 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           POWERPLANT - IGNITION SYSTEM: MAGNETOS
        FACTOR(S)
           POWERPLANT - ENGINE STRUCTURE: CRANKSHAFT
           TERRAIN - HIGH VEGETATION
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - 5000                       KIND OF OPERATION - SPRAYING CROPS
          KIND OF CROP - COTTON                                    TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -FASTENED-PROPERLY                    GLOVES - USED
          GOGGLES - NOT USED                                       CRASH HELMET - AVAILABLE USED
          COCKPIT CRASHPAD - INSTALLED                             CRASH BAR - INSTALLED
          TANK/HOPPER-LOCATION - FORWARD OF PILOT                  TERRAIN-TYPE -LEVEL,FLAT
          ELEVATION-AREA BEING TREATED-FEET -  75                  SWATH RUN-HOW FLOWN - WIND CALM
          PROCEDURE TURNAROUND - FIRST 1/3 TURN
        REMARKS- MAGNETO PAWL LOCKED CAUSING FAILURE OF CRANKSHAFT GEAR DOWEL.PAWL WAS WORN AND EXCESSIVELY LOOSE.
```

## Aircraft

- Registration: [N6527Z](https://openairdocs.org/deregistered/N6527Z-2015-05-14), registration cancelled 2015-05-14, S/N 25-2060, built 1962 (OpenAirDocs)
- Reported make and model: PIPER PA-25
- Registry model: [Piper PA-25-235](https://openairdocs.org/model/piper-pa-25-235) (registry code 7102504) (OpenAirDocs)
- Registry engine: [Lycoming 0-540 series](https://openairdocs.org/engine/lycoming-0-540-series) (registry code 41532, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N6527Z (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 FTW81FQA40](https://openairdocs.org/ntsb/FTW81FQA40), Jul 28, 1981: Piper PA-25 (N6527Z), Dexter, NM, 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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