# NTSB CHI70A0018: Navion A, N4393K, Milwaukee, WI, September 27, 1969

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: September 27, 1969
- Place: Milwaukee, WI · MILWAUKEE, WI
- Location: 43.0389° N, 87.9065° W: Placed by OpenAirDocs: center of Milwaukee, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0389&lon=-87.9065&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 1 fatal, 2 serious
- Status: Completed, report August 11, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 155047
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI70A0018
- Page: https://openairdocs.org/ntsb/CHI70A0018

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3780  69/9/27    MILWAUKEE,WIS       NAVION A            CR-  0  1  0  NONCOMMERCIAL             PRIVATE, AGE 38, 178
        TIME - 1635                    N4393K              PX-  1  1  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 90 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MILWAUKEE,WIS               MILWAUKEE,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           FIRE OR EXPLOSION: IN FLIGHT                             IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: BUILDING(S)                               LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - PROPELLER AND ACCESSORIES: HYDRAULIC PITCH CONTROL MECHANISM
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - LEAK/LEAKAGE
           MISCELLANEOUS ACTS,CONDITIONS - FIRE IN ENGINE
           MISCELLANEOUS ACTS,CONDITIONS - IMPROPERLY INSTALLED
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           TERRAIN - HIGH OBSTRUCTIONS
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - WINDSHIELD,DIRTY,FOGGY,ETC.-RESTRICTED VISION
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
                                  SMOKE IN COCKPIT
        REMARKS- A-38 BEARING,INSTALLED BACKWARDS,BROKE.DIAPHRAGM THEN BROKE ALLOWING OIL TO LEAK ONTO HOT ENG.
```

## Aircraft

- Registration: [N4393K](https://openairdocs.org/deregistered/N4393K-1970-06-29), registration cancelled 1970-06-29, S/N NAV-4-1393 (OpenAirDocs)
- Reported make and model: NAVION A
- Registry model: [Ryan NAVION A](https://openairdocs.org/model/ryan-navion-a) (registry code 6150162) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed

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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