# NTSB FTW73DPD46: Piper PA-25, N6686Z, Crowell, TX, June 26, 1973

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: June 26, 1973
- Place: Crowell, TX · CROWELL, TX
- Location: 33.9836° N, 99.7244° W: Placed by OpenAirDocs: center of Crowell, TX, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=33.9836&lon=-99.7244&mi=10
- Phase of flight: [Maneuvering](https://openairdocs.org/ntsb-phases/450) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report July 24, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 190272
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=FTW73DPD46
- Page: https://openairdocs.org/ntsb/FTW73DPD46

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1484  73/6/26    CROWELL,TEX         PIPER PA-25         CR-  0  0  1  COMMERCIAL                AIRLINE TRANSPORT, AGE
        TIME - 0545                    N6686Z              PX-  0  0  0  AERIAL APPLICATION        55, 12000 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            800 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          CROWELL,TEX                 LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: PROCEDURE TURNAROUND
           COLLISION WITH GROUND/WATER: CONTROLLED                  LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: IMPROPER MAINTENANCE (MAINTENANCE PERSONNEL)
           POWERPLANT - REDUCTION GEAR ASSEMBLY: SHAFT,ACCESSORY DRIVE
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
           MISCELLANEOUS ACTS,CONDITIONS - EXCESSIVE-WEAR/PLAY
           TERRAIN - OTHER
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
         SPECIAL DATA
          TOTAL HOURS IN CROP CONTROL - UNKNOWN/NOT REPORTED       KIND OF OPERATION - SPRAYING FORESTS
          KIND OF CROP - MOSQUITO CONTROL                          TYPE OF CHEMICAL USED - LIQUID CHEMICAL-TOXIC
          PILOT' S SEAT BELT -UNKNOWN/NOT REPORTED                 TANK/HOPPER-LOCATION - FORWARD OF PILOT
          TERRAIN-TYPE -DENSE WITH TREES                           ELEVATION-AREA BEING TREATED-FEET -  1700
          SWATH RUN-HOW FLOWN - UNKNOWN/NOT REPORTED               PROCEDURE TURNAROUND - ENTRY TO PROCEDURE TURN
         FIRE AFTER IMPACT
        REMARKS- L CRANKSHAFT IDLER GR SHAFT P/N 73010 LOOSENED.CAP SCREW P/N 1838 WORN OTR DISINTEGRATED.CEDAR BK.
```

## Aircraft

- Registration: [N6686Z](https://openairdocs.org/deregistered/N6686Z-1973-07-27), registration cancelled 1973-07-27, S/N 25-2299 (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)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19730626020349A](https://openairdocs.org/incident/19730626020349A), Jun 26, 1973: Piper PA25235, Crowell, TX, Destroyed. L crankshaft idler gr shaft p/n 73010 loosened. Cap screw p/n 1838 worn otr disintegrated. Cedar bk.

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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