# NTSB CHI70FDJ11: Mooney M20E, N2680W, Lyndon Stn, WI, March 7, 1970

- Type: NTSB accident investigation
- Classification: Accident · Minor injuries · Closed
- Date: March 7, 1970
- Place: Lyndon Stn, WI · LYNDON STN, WI
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: Minor injuries
- Injuries: 1 minor
- Status: Completed, report October 1, 1970
- Report: Brief approved by the director
- NTSB case key (mKey): 137108
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=CHI70FDJ11
- Page: https://openairdocs.org/ntsb/CHI70FDJ11

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-1089   70/3/7    LYNDON STN,WIS      MOONEY M20E         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 40, 461
        TIME - 1100                    N2680W              PX-  0  0  0  BUSINESS                  TOTAL HOURS, 336 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        DEPARTURE POINT             INTENDED DESTINATION
          MADISON,WIS                 TOMAH,WIS
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           COLLIDED WITH: TREES                                     LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: VALVE ASSEMBLIES
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           POWERPLANT - IGNITION SYSTEM: SPARK PLUG
           MISCELLANEOUS - FOREIGN OBJECT DAMAGE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- EXHAUST VALVE NR 2 CYL FAILED,PIECES ENTERED NR 4 CYL,FAILED BOTH SPARK PLUGS.
```

## Aircraft

- Registration: [N2680W](https://openairdocs.org/aircraft/N2680W), registered now, S/N 1001, built 1966 (OpenAirDocs)
- Reported make and model: MOONEY M20E
- Registry model: [Mooney M20E](https://openairdocs.org/model/mooney-m20e) (registry code 5870212) (OpenAirDocs)
- Registry engine: [Lycoming I0360 series](https://openairdocs.org/engine/lycoming-i0360-series) (registry code 41515, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: 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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