# NTSB MKC66D0349: Mooney M20A, N6558B, Altura, MN, January 2, 1966

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: January 2, 1966
- Place: Altura, MN · ALTURA, MN
- Location: 44.0642° N, 91.9436° W: Placed by OpenAirDocs: center of Altura, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.0642&lon=-91.9436&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 3 uninjured
- Status: Completed, report April 15, 1966
- Report: Brief approved by the director
- NTSB case key (mKey): 173983
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC66D0349
- Page: https://openairdocs.org/ntsb/MKC66D0349

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-0356   66/1/2  NR.ALTURA MINN        MOONEY M20A         CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 29, 342
        TIME - 2045                    N6558B              PX-  0  0  2  PLEASURE/PERSONAL TRANSP  TOTAL HOURS, 197 IN TYPE,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            NOT INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           POWERPLANT - ENGINE STRUCTURE: CRANKSHAFT
           POWERPLANT - LUBRICATING SYSTEM: SEALS AND GASKETS
           MISCELLANEOUS ACTS,CONDITIONS - MATERIAL FAILURE
           MISCELLANEOUS ACTS,CONDITIONS - LEAK/LEAKAGE
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
        PARTIAL POWER LOSS - PARTIAL LOSS OF POWER - 1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
        REMARKS- CRANKSHAFT NOSE CASE SEAL FAILED.OIL SPRAYED ON WINDSHIELD.NIGHT OPERATION
```

## Aircraft

- Registration: [N6558B](https://openairdocs.org/deregistered/N6558B-1970-08-19), registration cancelled 1970-08-19, S/N 1228, built 1956 (OpenAirDocs)
- Reported make and model: MOONEY M20A
- Registry model: [Mooney M20A](https://openairdocs.org/model/mooney-m20a) (registry code 5870204) (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.

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.