# NTSB UNK65X1094: Mooney M21, N6679U, Grinnell, IA, December 22, 1964

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: December 22, 1964
- Place: Grinnell, IA · GRINNELL, IA
- Location: 41.7352° N, 92.7249° W: Placed by OpenAirDocs: center of Grinnell, IA, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=41.7352&lon=-92.7249&mi=10
- Phase of flight: [Enroute](https://openairdocs.org/ntsb-phases/400) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 4 uninjured
- Status: Completed, report February 12, 1965
- Report: Brief approved by the director
- NTSB case key (mKey): 180711
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=UNK65X1094
- Page: https://openairdocs.org/ntsb/UNK65X1094

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-3825  64/12/22   GRINNELL IA         MOONEY M21          CR-  0  0  1  NONCOMMERCIAL             PRIVATE, AGE 33, 56 TOTAL
        TIME - 1400                    N6679U              PX-  0  0  3  PLEASURE/PERSONAL TRANSP  HOURS, 8 IN TYPE, NOT
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            INSTRUMENT RATED.
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           ENGINE FAILURE OR MALFUNCTION                            IN FLIGHT: NORMAL CRUISE
           WHEELS-UP                                                LANDING: LEVEL OFF/TOUCHDOWN
        PROBABLE CAUSE(S)
           PILOT IN COMMAND - BECAME LOST/DISORIENTED
           PILOT IN COMMAND - ATTEMPTED OPERATION BEYOND EXPERIENCE/ABILITY LEVEL
           MISCELLANEOUS ACTS,CONDITIONS - FUEL EXHAUSTION
        COMPLETE POWER LOSS - COMPLETE ENGINE FAILURE/FLAMEOUT-1 ENGINE
        EMERGENCY CIRCUMSTANCES - FORCED LANDING OFF AIRPORT ON LAND
```

## Aircraft

- Registration: [N6679U](https://openairdocs.org/aircraft/N6679U), registered now, S/N 2513 (OpenAirDocs)
- Reported make and model: MOONEY M21
- Registry model: [Mooney M20C](https://openairdocs.org/model/mooney-m20c) (registry code 5870208) (OpenAirDocs)
- Registry engine: [Lycoming O&VO-360 series](https://openairdocs.org/engine/lycoming-o-vo-360-series) (registry code 41514, reciprocating) (OpenAirDocs)
- Category: Airplane
- Engines: reciprocating
- Damage: Substantial damage

## Other investigations on N6679U (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 BFO94LA106](https://openairdocs.org/ntsb/BFO94LA106), Jun 18, 1994: Mooney M20C (N6679U), Leesburg, VA, substantial damage. Probable cause: THE PILOT'S FAILURE TO MAINTAIN THE MINIMUM DESCENT ALTITUDE UNTIL THE PUBLISHED APPROACH FIX. FACTORS RELATED TO THE ACCIDENT WAS PILOT FATIGUE, LOW CEILINGS, OBSCURATION, AND FOG.

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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