# NTSB CHI67A0096: Piper PA-23, N4240P, Mt.Hope, WI, February 12, 1967

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: February 12, 1967
- Place: Mt.Hope, WI · MT.HOPE, WI
- Location: 42.9696° N, 90.8596° W: Placed by OpenAirDocs: center of Mount Hope, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=42.9696&lon=-90.8596&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report June 19, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 118276
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI67A0096
- Page: https://openairdocs.org/ntsb/CHI67A0096

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-4656  67/2/12    MT.HOPE,WIS         PIPER PA-23         CR-  0  0  1  COMMERCIAL                COMMERCIAL, AGE 39, 2053
        TIME - 1255                    N4240P              PX-  0  0  3  AIR TAXI-PASSG            TOTAL HOURS, 35 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           MISCELLANEOUS ACTS,CONDITIONS - ICE-CARBURETOR
           SYSTEMS - ANTI-ICING,DE-ICING SYSTEMS: CARBURETOR DE-ICING SYSTEM
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPER ALIGNMENT/ADJUSTMENT
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           WEATHER - CONDITIONS CONDUCIVE TO CARB./INDUCTION SYSTEM ICING
           TERRAIN - ROUGH/UNEVEN
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        WEATHER BRIEFING - BRIEFED BY FLIGHT SERVICE PERSONNEL, BY PHONE
        WEATHER FORECAST - FORECAST SUBSTANTIALLY CORRECT
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        SKY CONDITION                                            CEILING AT ACCIDENT SITE
          OVERCAST                                                  1000
        VISIBILITY AT ACCIDENT SITE                              PRECIPITATION AT ACCIDENT SITE
          3 MILES OR LESS                                          SNOW
        OBSTRUCTIONS TO VISION AT ACCIDENT SITE                  WIND DIRECTION-DEGREES
          NONE                                                     230
        WIND VELOCITY-KNOTS                                      TYPE OF WEATHER CONDITIONS
           15                                                      IFR
        TYPE OF FLIGHT PLAN
          IFR
        REMARKS- CARBURETOR HEAT SHROUDS MISALIGNED.CARBURETOR HEAT BUTTERFLY VALVES WOULD NOT CLOSE COMPLETELY.
```

## Aircraft

- Registration: [N4240P](https://openairdocs.org/deregistered/N4240P-1977-07-07), registration cancelled 1977-07-07, S/N 23-1739 (OpenAirDocs)
- Reported make and model: PIPER PA-23
- Registry model: [Piper PA-23-160](https://openairdocs.org/model/piper-pa-23-160) (registry code 7102304) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N4240P (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 MIA77FA016](https://openairdocs.org/ntsb/MIA77FA016), Dec 6, 1976: Piper PA-23 (N4240P), Clewiston, FL, destroyed, 5 fatal
- [NTSB CHI68D0130](https://openairdocs.org/ntsb/CHI68D0130), Jun 15, 1967: Piper PA-23 (N4240P), Chicago, IL, 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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