# N681SM: 2025 Bryan S Mcroberts SLING 4 TSI - Status: Valid registration - Airframe: [Bryan S Mcroberts SLING 4 TSI](https://openairdocs.org/model/bryan-s-mcroberts-sling-4-tsi) (registry code 0564123, 4 seats) - Engine: [Rotax 915 IS series](https://openairdocs.org/engine/rotax-915-is-series) (registry code 55620) - Data sheets: [TCDS E00051EN](https://openairdocs.org/tcds/E00051EN) (BRP-Rotax GmbH & Co KG) (OpenAirDocs) - Serial number: 285SK - Year built: 2025 - Type: Fixed wing single engine - Engine type: Reciprocating - Kit: Airplane Factory SLING 4 TSI - Airworthiness: Experimental, amateur built - Airworthiness date: February 13, 2025 - Certificate issued: October 2, 2023 - Expires: October 31, 2030 - Mode S code: A9088A - Registered owner: [Mcroberts Bryan S](https://openairdocs.org/faa-owner/MCROBERTS%20BRYAN%20S) - Location: [Chesapeake, VA](https://openairdocs.org/faa-place/VA/Chesapeake) - Owner type: Individual - Owner's area on the map: 36.6260° N, 76.2678° W: Placed by OpenAirDocs at the center of ZIP code 23322, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft is based - FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=681SM - Page: https://openairdocs.org/aircraft/N681SM 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. The registry lists only the engine series, so ADs for every Rotax 915 IS model are included. ## ADs that may apply (OpenAirDocs): 2 in force ### Matched by airframe (Bryan S Mcroberts SLING 4 TSI) None in force. ### Matched by engine (Rotax 915 IS series) - [AD 2026-04-02](https://openairdocs.org/ad/2026-04-02): Turbine Engine Reduction Gear · BRP-Rotax 915 iSc2 C24 and 915 iSc3 C24. Effective Mar 19, 2026 - [AD 2025-15-03](https://openairdocs.org/ad/2025-15-03): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Aug 6, 2025 ### Historical (superseded or no longer in force) - [AD 2025-07-02](https://openairdocs.org/ad/2025-07-02) (historical): Reciprocating Engine Oil System · BRP-Rotax 912 iSc2 Sport, 912 iSc3 Sport, 915 iSc2 C24 and 1 more. Effective Apr 21, 2025 ## Information bulletins (advisory) None matched. ## NTSB investigations None matched to N681SM. ## FAA accident and incident reports None matched to N681SM. ## 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) (1) Approved for this aircraft's airframe or engine model, in force first, then newest. The registry doesn't record which STCs an aircraft has; its records do. ### Approved for the engine (Rotax 915 IS series) - [STC SE01966WI](https://openairdocs.org/stc/SE01966WI): Use of GAMI G100UL High Octane Unleaded Avgas in spark ignition piston aircraft engines. General Aviation Modifications Inc. Lists 915 iSc2 C24 ## Earlier aircraft with N681SM The FAA can reassign an N-number once a registration is cancelled. These aircraft carried N681SM before. - [Cancelled 2002-09-06](https://openairdocs.org/deregistered/N681SM-2002-09-06): Aero Commander 681, S/N 6014. Exported to Venezuela. Owner: [Aircraft Guaranty Trust LLC Trustee](https://openairdocs.org/faa-owner/AIRCRAFT%20GUARANTY%20TRUST%20LLC%20TRUSTEE), [Houston, TX](https://openairdocs.org/faa-place/TX/Houston) ## Related - Other Bryan S Mcroberts SLING 4 TSI aircraft: https://openairdocs.org/model/bryan-s-mcroberts-sling-4-tsi/aircraft.md - The Rotax 915 IS series engine: https://openairdocs.org/engine/rotax-915-is-series.md --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.