# NTSB OAK74AVA61: Navion A, N8929H, Patterson, CA, April 28, 1974

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 28, 1974
- Place: Patterson, CA · PATTERSON, CA
- Location: 37.4785° N, 121.1545° W: Placed by OpenAirDocs: center of Patterson, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=37.4785&lon=-121.1545&mi=10
- Phase of flight: [Approach](https://openairdocs.org/ntsb-phases/500) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report June 3, 1974
- Report: Brief approved by the director
- NTSB case key (mKey): 186160
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK74AVA61
- Page: https://openairdocs.org/ntsb/OAK74AVA61

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1001  74/4/28    PATTERSON,CALIF     NAVION A            CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 43, 363
        TIME - 1730                    N8929H              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 119 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        NAME OF AIRPORT - RANCH STRIP
        DEPARTURE POINT             INTENDED DESTINATION
          CORONA,CALIF                PATTERSON,CALIF
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            LANDING: FINAL APPROACH
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - ATTEMPTED OPERATION W/KNOWN DEFICIENCIES IN EQUIPMENT
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
           POWERPLANT - FUEL SYSTEM: PUMPS
           MISCELLANEOUS ACTS,CONDITIONS - PRESSURE,NONE
           MISCELLANEOUS ACTS,CONDITIONS - FUEL STARVATION
           TERRAIN - ROUGH/UNEVEN
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- FUEL PRESSURE RELIEF VALVE MALFUNCTIONED DUE TO GROOVES WORN IN BALL CHECK.HAD LOST PRESSURE BFOR.
```

## Aircraft

- Registration: [N8929H](https://openairdocs.org/aircraft/N8929H), registered now, S/N NAV-4-929, built 1947 (OpenAirDocs)
- Reported make and model: NAVION A
- Registry model: [North American NAVION](https://openairdocs.org/model/north-american-navion) (registry code 6150130) (OpenAirDocs)
- Registry engine: [Continental E225 series](https://openairdocs.org/engine/continental-e225-series) (registry code 17015, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Ranch Strip

## FAA reports on this event (1)

The FAA's own accident and incident reports, matched to the aircraft by N-number and date (OpenAirDocs).

- [Accident 19740428010149A](https://openairdocs.org/incident/19740428010149A), Apr 28, 1974: Navion NAVION*, Patterson, CA, Substantial damage. Fuel pressure relief valve malfunctioned due to grooves worn in ball check. Had lost pressure bfor.

## Other investigations on N8929H (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 LAX68D0402](https://openairdocs.org/ntsb/LAX68D0402), May 4, 1968: Navion A (N8929H), Palm Sprngs, CA, substantial damage
- [NTSB LAX67D0420](https://openairdocs.org/ntsb/LAX67D0420), May 6, 1967: Navion A (N8929H), Burbank, CA, 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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