# NTSB MKC69D0028: Piper PA-12, N3643M, Lake Elmo, MN, April 28, 1968

- Type: NTSB accident investigation
- Classification: Accident · No injuries · Closed
- Date: April 28, 1968
- Place: Lake Elmo, MN · LAKE ELMO, MN
- Location: 44.9879° N, 92.9097° W: Placed by OpenAirDocs: center of Lake Elmo, MN, within about 6 miles (OpenAirDocs)
- Nearby events: https://openairdocs.org/map.md?lat=44.9879&lon=-92.9097&mi=10
- Phase of flight: [Landing](https://openairdocs.org/ntsb-phases/550) (OpenAirDocs' grouping)
- Highest injury: No injuries
- Injuries: 2 uninjured
- Status: Completed, report July 30, 1968
- Report: Brief approved by the director
- NTSB case key (mKey): 110529
- NTSB case page: https://web.ntsb.gov/investigations/?ntsbnumber=MKC69D0028
- Page: https://openairdocs.org/ntsb/MKC69D0028

## NTSB brief

```
----------------------------------------------------------------------------------------------------------------------------
 FILE    DATE          LOCATION          AIRCRAFT DATA       INJURIES       FLIGHT                        PILOT DATA
                                                               F  S M/N     PURPOSE
----------------------------------------------------------------------------------------------------------------------------
3-2178  68/4/28    LAKE ELMO,MINN      PIPER PA-12         CR-  0  0  2  INSTRUCTIONAL             COMMERCIAL, FL.INSTR.,
        TIME - 1130                    N3643M              PX-  0  0  0  DUAL                      AGE 29, 430 TOTAL HOURS,
                                       DAMAGE-SUBSTANTIAL  OT-  0  0  0                            26 IN TYPE, INSTRUMENT
                                                                                                   RATED.
        NAME OF AIRPORT - LAKE ELMO
        TYPE OF ACCIDENT                                         PHASE OF OPERATION
           GROUND-WATER LOOP-SWERVE                                 LANDING: ROLL
           GEAR COLLAPSED                                           LANDING: ROLL
        PROBABLE CAUSE(S)
           DUAL STUDENT - FAILED TO MAINTAIN DIRECTIONAL CONTROL
           PILOT IN COMMAND - INADEQUATE SUPERVISION OF FLIGHT
        FACTOR(S)
           MISCELLANEOUS ACTS,CONDITIONS - OVERLOAD FAILURE
```

## Aircraft

- Registration: [N3643M](https://openairdocs.org/aircraft/N3643M), registered now, S/N 12-2496 (OpenAirDocs)
- Reported make and model: PIPER PA-12
- Registry model: [Piper PA-12](https://openairdocs.org/model/piper-pa-12) (registry code 7101202) (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: Lake Elmo

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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