# NTSB CHI73FCA01: Piper PA-25, N7247Z, Dorsey, IL, September 30, 1972

- Type: NTSB accident investigation
- Classification: Accident · Serious injuries · Closed
- Date: September 30, 1972
- Place: Dorsey, IL · DORSEY, IL
- Location: 38.9737° N, 90.0015° W: Placed by OpenAirDocs: center of Dorsey, IL, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=38.9737&lon=-90.0015&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Serious injuries
- Injuries: 1 serious
- Status: Completed, report November 13, 1973
- Report: Brief approved by the director
- NTSB case key (mKey): 168535
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI73FCA01
- Page: https://openairdocs.org/ntsb/CHI73FCA01

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2543  72/9/30    DORSEY,ILL          PIPER PA-25         CR-  0  1  0  COMMERCIAL                COMMERCIAL, AGE 48, 15122
        TIME - 0945                    N7247Z              PX-  0  0  0  ASSOC CROP CTL ACTIVITY   TOTAL HOURS, 2500 IN
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            TYPE, NOT INSTRUMENT
                                                                                                   RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          DORSEY,ILL                  LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: EN ROUTE TO TREAT CROP
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           PILOT IN COMMAND - FAILED TO OBTAIN/MAINTAIN FLYING SPEED
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - LOAD NOT JETTISONED
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- ENG DID NOT CHECK PROPERLY DURG PREFLT.NR 2 EXH VALVE FAILED,WENT THRU PISTON HEAD.FLAT DESCENT.
```

## Aircraft

- Registration: [N7247Z](https://openairdocs.org/deregistered/N7247Z-2019-02-04), registration cancelled 2019-02-04, S/N 25-3176, built 1965 (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 N7247Z (3)

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 GAA18CA222](https://openairdocs.org/ntsb/GAA18CA222), Apr 22, 2018: Piper PA 25-235 (N7247Z), Saratoga Springs, NY, substantial damage. Probable cause: The glider pilot’s failure to maintain pitch during a CG aerotow, which resulted in the loss of control of the tow airplane.
- [NTSB NYC01LA222](https://openairdocs.org/ntsb/NYC01LA222), Sep 2, 2001: Piper PA-25 (N7247Z), Warren, VT, substantial damage. Probable cause: The pilot's improper fuel planning, which resulted in fuel exhaustion.
- [NTSB MKC68D0027](https://openairdocs.org/ntsb/MKC68D0027), Jun 17, 1967: Piper PA-25 (N7247Z), Cauker City, KS, 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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