# N91MC: 1975 Schweizer SGS 1-35, registration cancelled 2013-05-17

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 17, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Schweizer SGS 1-35](https://openairdocs.org/model/schweizer-sgs-1-35) (registry code 8050148)
- Engine: [NONE](https://openairdocs.org/engine/none) (registry code 00000)
- Data sheets: [TCDS G4EA](https://openairdocs.org/tcds/G4EA) (OpenAirDocs)
- Serial number: 37
- Year built: 1975
- Type of aircraft: Glider
- Engine type: None
- Airworthiness: Standard, glider
- Airworthiness date: July 24, 1975
- Certificate issued: May 4, 1987
- Last registry action: March 17, 2009
- Mode S code: AC9568
- Owner when cancelled: [Smith Francis J](https://openairdocs.org/faa-owner/SMITH%20FRANCIS%20J)
- Location: [Mckees Rocks, PA](https://openairdocs.org/faa-place/PA/Mckees%20Rocks)
- Owner type: Individual
- Owner's area on the map: 40.4626° N, 80.1070° W: Placed by OpenAirDocs at the center of ZIP code 15136, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N91MC
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=91MC
- Page: https://openairdocs.org/deregistered/N91MC-2013-05-17

From the FAA registry file of October 29, 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 Schweizer SGS 1-35: https://openairdocs.org/model/schweizer-sgs-1-35.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 NYC06LA127](https://openairdocs.org/ntsb/NYC06LA127), May 28, 2006: Schweizer SGS 1-35 (N91MC), Eighty Four, PA, substantial damage, 1 fatal. Probable cause: The pilot's incapacitation, which resulted in a loss of aircraft control during approach, and subsequent collision with trees.

## 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 20060528014279A](https://openairdocs.org/incident/20060528014279A), May 28, 2006: Scwzer SGS135 (N91MC), Eighty Four, PA, Destroyed, 1 fatal. (-23) Aircraft was in landing pattern. Witness stated aircraft left wing dropped down then nose of aircraft pointed down toward the ground. Aircraft hit a tree…

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