# NTSB CHI78IA002: Cessna 421B, N5965M, Mt Vernon, OH, October 3, 1978

- Type: NTSB incident investigation
- Classification: Incident · No injuries · Closed
- Date: October 3, 1978
- Place: Mt Vernon, OH · MT VERNON, OH
- Location: 40.3852° N, 82.4749° W: Placed by OpenAirDocs: center of Mount Vernon, OH, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=40.3852&lon=-82.4749&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 5 uninjured
- Status: Completed, report January 12, 1979
- Report: Brief approved by the director
- NTSB case key (mKey): 138247
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI78IA002
- Page: https://openairdocs.org/ntsb/CHI78IA002

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
5-0022   78/10/3 NR.MT VERNON,OH       CESSNA 421B         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 34, 439
        TIME - 1815                    N5965M              PX-  0  0  4  BUSINESS                  TOTAL HOURS, 41 IN TYPE,
                                       DAMAGE-NONE         OT-  0  0  0                            INSTRUMENT RATED.
        CLASSIFIED AS INCIDENT
        DEPARTURE POINT             INTENDED DESTINATION
          PORT COLUMBUS,OH            NEW PHILADELPHIA,OH
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: NORMAL CRUISE
        PROBABLE CAUSE(S)
           SYSTEMS - ELECTRICAL SYSTEM: CONVERTER
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
        FACTOR(S)
           MISCELLANEOUS - SMOKE IN COCKPIT
        REMARKS- ELECTRO MECH INC AC DC QUAD INVERTER INSTALLED TWO HOURS PRIOR TO FAILURE.
```

## Aircraft

- Registration: [N5965M](https://openairdocs.org/deregistered/N5965M-1998-12-09), registration cancelled 1998-12-09, S/N 421B0208 (OpenAirDocs)
- Reported make and model: CESSNA 421B
- Registry model: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014) (OpenAirDocs)
- Category: Airplane
- Engines: turbo prop
- Damage: No damage
- Airport: Port Columbus

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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