# N231LK: 1980 Mooney M20K, registration cancelled 2007-04-12

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 12, 2007
- Status when cancelled: Second triennial form not returned
- Airframe: [Mooney M20K](https://openairdocs.org/model/mooney-m20k) (registry code 5870220)
- Engine: [Continental TSIO-360 series](https://openairdocs.org/engine/continental-tsio-360-series) (registry code 17019)
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3), [TCDS E9CE](https://openairdocs.org/tcds/E9CE) (OpenAirDocs)
- Serial number: 25-0298
- Year built: 1980
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: January 11, 1980
- Certificate issued: November 22, 2003
- Last registry action: December 29, 2006
- Mode S code: A20D3B
- Owner when cancelled: [Knickerbocker Aviation Inc](https://openairdocs.org/faa-owner/KNICKERBOCKER%20AVIATION%20INC)
- Location: [Philadelphia, PA](https://openairdocs.org/faa-place/PA/Philadelphia)
- Owner type: Corporation
- Owner's area on the map: 39.9364° N, 75.1547° W: Placed by OpenAirDocs at the center of ZIP code 19147, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N231LK
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=231LK
- Page: https://openairdocs.org/deregistered/N231LK-2007-04-12

From the FAA registry file of October 31, 2026, cancelled registrations. Owners' street addresses are left out. The Mode S code belongs to the N-number, not the airframe.

ADs and bulletins for the Mooney M20K: https://openairdocs.org/model/mooney-m20k.md

## NTSB investigations (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.

## FAA accident and incident reports (3)

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.

- [Accident 20040812019319A](https://openairdocs.org/incident/20040812019319A), Aug 12, 2004: Mooney M20K (N231LK), Marthas Vineyar, MA, Destroyed. (-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…
- [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.

## Other aircraft with N231LK

- [Registered now](https://openairdocs.org/aircraft/N231LK): Anton H Nerad II SONEX SUBSONEX JSX-2, S/N JSX0011, built 2019

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