# NTSB SEA66F0152: Cessna 170B, N3122A, Silverdale, WA, October 13, 1965

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: October 13, 1965
- Place: Silverdale, WA · SILVERDALE, WA
- Location: 47.6677° N, 122.6819° W: Placed by OpenAirDocs: center of Silverdale, WA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=47.6677&lon=-122.6819&mi=10
- Phase of flight: [Initial climb](https://openairdocs.org/ntsb-phases/350) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 1 uninjured
- Status: Completed, report February 7, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 175398
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=SEA66F0152
- Page: https://openairdocs.org/ntsb/SEA66F0152

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3680  65/10/13   SILVERDALE WASH     CESSNA 170B         CR-  0  0  1  MISCELLANEOUS             COMMERCIAL, AGE 39, 900
        TIME - 1830                    N3122A              PX-  0  0  0  TEST                      TOTAL HOURS, 10 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        NAME OF AIRPORT - APEX AIRPARK
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            TAKEOFF: INITIAL CLIMB
           GEAR COLLAPSED                                           LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS ACTS,CONDITIONS - FATIGUE FRACTURE
           PERSONNEL - MAINTENANCE,SERVICING,INSPECTION: INADEQUATE MAINTENANCE AND INSPECTION
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING ON AIRPORT/SEAPLANE BASE/HELIPT.
        REMARKS- EXHAUST VALVE BURNED.SPARK PLUGS EXCESSIVELY WORN
```

## Aircraft

- Registration: [N3122A](https://openairdocs.org/aircraft/N3122A), registered now, S/N 25766, built 1953 (OpenAirDocs)
- Reported make and model: CESSNA 170B
- Registry model: [Cessna 170B](https://openairdocs.org/model/cessna-170b) (registry code 2072306) (OpenAirDocs)
- Registry engine: [Continental C145 series](https://openairdocs.org/engine/continental-c145-series) (registry code 17012, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage
- Airport: Apex Airpark

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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