# N129MG: Alexander Schleicher ASW 27-18

- Status: Valid registration
- Airframe: [Alexander Schleicher ASW 27-18](https://openairdocs.org/model/alexander-schleicher-asw-27-18) (registry code 3801538, 1 seats)
- Serial number: 29081
- Type: Glider
- Engine type: None
- Certificate issued: June 14, 2023
- Expires: June 30, 2030
- Mode S code: A0763B
- Registered owners: [Keller Shaun C](https://openairdocs.org/faa-owner/KELLER%20SHAUN%20C), [Keller Catherine M](https://openairdocs.org/faa-owner/KELLER%20CATHERINE%20M)
- Location: [Lexington, MA](https://openairdocs.org/faa-place/MA/Lexington)
- Owner type: Co-owned
- Owner's area on the map: 42.4591° N, 71.2177° W: Placed by OpenAirDocs at the center of ZIP code 02420, within about a mile (OpenAirDocs). The owner's mailing address, not where the aircraft is based
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=129MG
- Page: https://openairdocs.org/aircraft/N129MG

From the FAA registry file of October 24, 2026. ADs below are matched by the registry's airframe and engine model codes. They may apply; each AD's applicability can narrow it by serial number, part number or installed equipment. This is not a compliance determination.

## ADs that may apply (OpenAirDocs): 0 in force

### Matched by airframe (Alexander Schleicher ASW 27-18)

None in force.

## Information bulletins (advisory)

None matched.

## 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 ERA21LA329](https://openairdocs.org/ntsb/ERA21LA329), Jul 15, 2021: Alexander Schleicher ASW 27-18 (N129MG), Sterling, MA, substantial damage. Probable cause: The pilot’s failure to maintain the glider’s stability in the roll axis during the takeoff roll, which resulted in a dragged wingtip and ground loop.

## FAA accident and incident reports (1)

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 20210715010749A](https://openairdocs.org/incident/20210715010749A), Jul 15, 2021: Alexander Schleicher Gmbh & Co ASW 27-18 (N129MG), Sterling, MA, Substantial damage. Loss of directional control resulted in a ground loop while under tow during the takeoff roll. Ground loop resulted in substantial damage to the aircraft…

## Service difficulty reports

None filed for this aircraft. Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

## STCs that may be installed (OpenAirDocs)

None matched to this aircraft's models.

## Related

- Other Alexander Schleicher ASW 27-18 aircraft: https://openairdocs.org/model/alexander-schleicher-asw-27-18/aircraft.md

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