# NTSB OAK67A0003: Cessna 172G, N4466L, Livermore, CA, July 4, 1966

- Type: NTSB accident investigation
- Classification: Accident · Fatal · Closed
- Date: July 4, 1966
- Place: Livermore, CA · LIVERMORE, CA
- Location: 37.6870° N, 121.7598° W: Placed by OpenAirDocs: center of Livermore, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.6870&lon=-121.7598&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: Fatal
- Injuries: 6 fatal
- Status: Completed, report April 21, 1967
- Report: Brief approved by the director
- NTSB case key (mKey): 171149
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK67A0003
- Page: https://openairdocs.org/ntsb/OAK67A0003

## NTSB brief (aircraft 2)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0777   66/7/4    LIVERMORE CALIF     PIPER PA-16         CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 47, 393
        TIME - 1620                    N5887H              PX-  1  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 183 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  4  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LIVERMORE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  TAKEOFF: OTHER
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   CONVERGENCE ANGLE-DEGREES -  180
          HORIZONTAL COLLISION ANGLE-DEGREES -   180               EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
         FIRE AFTER IMPACT
        REMARKS- N5887H WAS DEPARTING TFC PATTERN AT 45 DEGREE ANGLE,N4466L WAS ENTERING PATTERN AT 45 DEGREE ANGLE
```

## NTSB brief (aircraft 1)

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
2-0777   66/7/4    LIVERMORE CALIF     CESSNA 172G         CR-  1  0  0  NONCOMMERCIAL             PRIVATE, AGE 35, 210
        TIME - 1620                    N4466L              PX-  3  0  0  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 86 IN TYPE,
                                       DAMAGE-DESTROYED    OT-  2  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - LIVERMORE
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           COLLISION WITH AIRCRAFT: BOTH IN FLIGHT                  LANDING: OTHER
           COLLISION WITH GROUND/WATER: UNCONTROLLED                IN FLIGHT: UNCONTROLLED DESCENT
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO SEE AND AVOID OTHER AIRCRAFT
           PERSONNEL - MISCELLANEOUS-PERSONNEL: PILOT OF OTHER AIRCRAFT
         SPECIAL DATA
          SEGMENTS OF AVIATION INVOLVED - SMALL US GEN.AV.-SMALL US GEN.AV.
          CONTROLLING AGENCY - NO CONTROL                          RADAR CTL/SURVEILLANCE - NOT UNDER RADAR CONTACT
          TRAFFIC ADVISORY ISSUED - NONE                           CONTROLLED/UNCONTROLLED AIRPORT - UNCONTROLLED AIRPORT
          CONTROL ZONE/AREA - NO                                   CONVERGENCE ANGLE-DEGREES -  180
          HORIZONTAL COLLISION ANGLE-DEGREES -   180               EVASIVE ACTION TAKEN - UNKNOWN/NOT REPORTED
          ANTI-COLLISION LIGHTS - INSTALLED,OPERATION UNKNOWN
        REMARKS- N4466L WAS ENTERING TFC PATTERN AT 45 DEGREE ANGLE WHILE N5887H WAS DEPARTING PATTERN AT 45 ANGLE
```

## Aircraft 1

- Registration: [N4466L](https://openairdocs.org/deregistered/N4466L-1968-11-13), registration cancelled 1968-11-13, S/N 17254561, built 1966 (OpenAirDocs)
- Reported make and model: CESSNA 172G
- Registry model: [Cessna 172G](https://openairdocs.org/model/cessna-172g) (registry code 2072420) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Livermore

## Aircraft 2

- Registration: [N5887H](https://openairdocs.org/deregistered/N5887H-1971-02-02), registration cancelled 1971-02-02, S/N 16-507 (OpenAirDocs)
- Reported make and model: PIPER PA-16
- Registry model: [Piper PA-16](https://openairdocs.org/model/piper-pa-16) (registry code 7101602) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Destroyed
- Airport: Livermore

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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