# NTSB OAK70DVG09: Piper PA-18, N4420Z, Maxwell, CA, April 6, 1970

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 6, 1970
- Place: Maxwell, CA · MAXWELL, CA
- Location: 39.2771° N, 122.1947° W: Placed by OpenAirDocs: center of Maxwell, CA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=39.2771&lon=-122.1947&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report January 12, 1971
- Report: Brief approved by the director
- NTSB case key (mKey): 129117
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=OAK70DVG09
- Page: https://openairdocs.org/ntsb/OAK70DVG09

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1754   70/4/6  NR.MAXWELL,CALIF      PIPER PA-18         CR-  0  0  1  INSTRUCTIONAL             STUDENT, AGE 23, 35 TOTAL
        TIME - 1630                    N4420Z              PX-  0  0  0  TRAINING                  HOURS, 9 IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - GUNNERSFIELD
        DEPARTURE POINT             INTENDED DESTINATION
          MAXWELL,CALIF               LOCAL
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           NOSE OVER/DOWN                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - MISJUDGED DISTANCE AND SPEED
        REMARKS- LANDED ONE-HALF WAY DOWN 2600FT RWY.FLT CONTROLS,BRAKES AND SEAT ADJUSTMENT CHECKED OK.
```

## Aircraft

- Registration: [N4420Z](https://openairdocs.org/aircraft/N4420Z), registered now, S/N 18-8756 (OpenAirDocs)
- Reported make and model: PIPER PA-18
- Registry model: [Piper PA-18-150](https://openairdocs.org/model/piper-pa-18-150) (registry code 7101828) (OpenAirDocs)
- Registry engine: [Lycoming 0-320 series](https://openairdocs.org/engine/lycoming-0-320-series) (registry code 41508, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Gunnersfield

## Other investigations on N4420Z (1)

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 GAA17CA352](https://openairdocs.org/ntsb/GAA17CA352), Jun 18, 2017: Piper PA 18 (N4420Z), Red Bluff, CA, substantial damage. Probable cause: The pilot’s failure to maintain pitch control during the landing roll in gusting wind conditions, which resulted in a nose-over.

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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