# Accident 20040812019319A: Mooney M20K, Marthas Vineyar, MA, August 12, 2004

- Type: FAA accident report (Accident/Incident Data System), as reported
- Date: August 12, 2004, 18:12 local time
- Place: Marthas Vineyar, MA
- Airport: Marthas Vineyard
- Damage: Destroyed
- Phase of flight: Final Approach
- Operating rules: General operating rules (Part 91)
- Location: 41.3928° N, 70.6142° W: From the FAA
- Nearby events: https://openairdocs.org/map.md?lat=41.3928&lon=-70.6142&mi=10
- Aircraft: N231LK, a cancelled registration (https://openairdocs.org/deregistered/N231LK-2007-04-12) (OpenAirDocs)
- Registry model: Mooney M20K (registry code 5870220, https://openairdocs.org/model/mooney-m20k) (OpenAirDocs)
- Registry engine: Continental TSIO-360 series (registry code 17019, https://openairdocs.org/engine/continental-tsio-360-series) (OpenAirDocs)
- Reported make and model: MOONEY M20K
- Fatal injuries: 0
- Pilot flight hours: 1,400 total, 300 in this make and model, 25 in the last 90 days
- NTSB investigation: [NTSB NYC04LA191](https://openairdocs.org/ntsb/NYC04LA191) (OpenAirDocs)
- FAA source: FAA Aviation Safety Information Portal (https://asip.faa.gov/)
- Page: https://openairdocs.org/incident/20040812019319A

## Narrative

As the FAA filed it, in capitals; the FAA replaces private details with ^PRIVACY DATA OMITTED^.

(-23) UNTERMEYER STATED THAT HE COMPLETED AN IFR FLIGHT FROM KPNE AND WAS DOWNWIND ON A VISUAL APPROACH FOR RUNWAY 24 AT MVY. HE REPORTED THAT HE WAS ASKED BY THE TOWER IF HE WANTED TO LAND RUNWAY 15 WHICH HE ACCEPTED, TURNED ONTO FINAL, STABILIZED HIS APPROACH AND WAS SLOWING THE AIRCRAFT FOR LANDING. HE STATED THAT HIS APPROACH SPEED WAS APPROXIMATELY 90 KNOTS. THE PILOT REPORTED HIS LEFT WING DROPPED AND HE WAS UNABLE TO CONTROL THE AIRCRAFT. HE STATED THAT THE CONTROL WHEEL WAS OPERABLE BUT THE AILERONS WERE INEFFECTIVE. THE PILOT REPORTED THERE WERE NO COCKPIT INDICATIONS OF A STALL. THE AIRCRAFT DEPARTED THE RUNWAY HEADING 90 DEGREES TO THE LEFT AND STRUCK A TREE TOP APPROXIMATELY 30 FEET ABOVE AGL, CONTINUED TO ROLL AND THE RIGHT WING CONTACTED THE GROUND 50 FEET FROM THE INITIAL IMPACT POINT LEAVING A 17 FOOT GROUND SCAR. THE PROPELLER SEPARATED FROM THE ENGINE WHEN IT IMPACTED THE GROUND AND WAS LOCATED 40 FEET FROM THE GROUND SCAR. A GROUND SCAR FROM ENGINE IMPACT WAS APPROXIMATELY 8 FEET FROM THE PROPELLER. THE ENGINE SEPARATED FROM THE AIRCRAFT AND CONTINUED FORWARD ALONG THE IMPACT PATH AND COMING TO REST 6 FEET FORWARD OF THE FUSELAGE BOTH APPROXIMATELY 138 FEET FROM THE INITIAL POINT OF IMPACT.

## The NTSB's investigation of this event (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 NYC04LA191](https://openairdocs.org/ntsb/NYC04LA191), Aug 12, 2004: Mooney M20K (N231LK), Edgartown, MA, substantial damage. Probable cause: The pilot's failure to maintain airspeed while performing maneuvers to land, which resulted in an inadvertent stall/mush. A factor was the gusting wind conditions.

## Other reports on N231LK (2)

Matched to the same aircraft by N-number and date.

- [Incident 19871203075379I](https://openairdocs.org/incident/19871203075379I), Dec 3, 1987: Mooney M20K (N231LK), Lumberton, NJ, Minor damage. Forgot to lower landing gear. Landed gear up.
- [Incident 19870426015419I](https://openairdocs.org/incident/19870426015419I), Apr 26, 1987: Mooney M20K (N231LK), East Stroudsbur, PA, Minor damage. Main landing gears collapsed during rollout. Found misrigging of the downlock micro switch.

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model. For accidents, the NTSB's own investigation is the fuller record.

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