# NTSB CHI71AC044: Cessna 402, N4045Q, Waukesha, WI, December 19, 1970

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: December 19, 1970
- Place: Waukesha, WI · WAUKESHA, WI
- Location: 43.0091° N, 88.2451° W: Placed by OpenAirDocs: center of Waukesha, WI, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=43.0091&lon=-88.2451&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 3 fatal
- Status: Completed, report March 1, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 159345
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI71AC044
- Page: https://openairdocs.org/ntsb/CHI71AC044

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2174  70/12/19   WAUKESHA,WIS        CESSNA 150K         CR-  2  0  0  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1420                    N6175G              PX-  0  0  0  DUAL                      AGE 57, 4232 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  1  0  0                            1121 IN TYPE, NOT
                                                                                                   INSTRUMENT RATED.
        NAME OF AIRPORT - WAUKESHA
        DEPARTURE POINT             INTENDED DESTINATION
          WAUKESHA,WIS                LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: CLIMB TO CRUISE
        PROBABLE CAUSE(S)
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - UNICOM                              RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  45
          HORIZONTAL COLLISION ANGLE-DEGREES -   45                EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- DEPG TRAFFIC PATTERN,COLLIDED WITH N4045Q APRX 800FT AGL.
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2174  70/12/19   WAUKESHA,WIS        CESSNA 402          CR-  1  0  0  NONCOMMERCIAL             COMMERCIAL, FL.INSTR.,
        TIME - 1420                    N4045Q              PX-  0  0  0  BUSINESS                  AGE 43, 2647 TOTAL HOURS,
                                       DAMAGE-DESTROYED    OT-  2  0  0                            89 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - WAUKESHA
        DEPARTURE POINT             INTENDED DESTINATION
          MILWAUKEE,WIS               WAUKESHA,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  IN FLIGHT: DESCENDING
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - UNICOM                              RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - YES                                  CONVERGENCE ANGLE-DEGREES -  45
          HORIZONTAL COLLISION ANGLE-DEGREES -   45                EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
         FIRE AFTER IMPACT
        REMARKS- DSNDG INTO TRAFFIC PATTERN.COLLIDED WITH N6175G APRX 800FT AGL.
```

## Aircraft 1

- Registration: [N4045Q](https://openairdocs.org/deregistered/N4045Q-1971-03-01), registration cancelled 1971-03-01, S/N 402-0145 (OpenAirDocs)
- Reported make and model: CESSNA 402
- Registry model: [Cessna 402](https://openairdocs.org/model/cessna-402) (registry code 207590K) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Waukesha

## Aircraft 2

- Registration: [N6175G](https://openairdocs.org/deregistered/N6175G-1971-03-01), registration cancelled 1971-03-01, S/N 15071675 (OpenAirDocs)
- Reported make and model: CESSNA 150K
- Registry model: [Cessna 150K](https://openairdocs.org/model/cessna-150k) (registry code 2071822) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Waukesha

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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