# N41SW: Wittman Sylvester J O & O, registration cancelled 2013-07-30

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 30, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Wittman Sylvester J O & O](https://openairdocs.org/model/wittman-sylvester-j-o-o) (registry code 05613TB)
- Engine: [Continental O-470 series](https://openairdocs.org/engine/continental-o-470-series) (registry code 17026)
- Serial number: 13
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: January 6, 1986
- Certificate issued: September 11, 1992
- Last registry action: September 11, 1998
- Mode S code: A4D36C
- Owners when cancelled: [Wittman Sylvester J](https://openairdocs.org/faa-owner/WITTMAN%20SYLVESTER%20J), [Wittman Paula M](https://openairdocs.org/faa-owner/WITTMAN%20PAULA%20M)
- Location: [Oshkosh, WI](https://openairdocs.org/faa-place/WI/Oshkosh)
- Owner type: Co-owned
- Owner's area on the map: 44.0232° N, 88.5623° W: Placed by OpenAirDocs: center of Oshkosh, WI, within about 3 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N41SW
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=41SW
- Page: https://openairdocs.org/deregistered/N41SW-2013-07-30

From the FAA registry file of October 27, 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 Wittman Sylvester J O & O: https://openairdocs.org/model/wittman-sylvester-j-o-o.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 ATL95FA092](https://openairdocs.org/ntsb/ATL95FA092), Apr 27, 1995: Wittman O&O (N41SW), Stevenson, AL, destroyed, 2 fatal. Probable cause: AILERON-WING FLUTTER INDUCED BY SEPARATION AT THE TRAILING EDGE OF AN UNBONDED PORTION OF WING FABRIC AT AN AILERON WING STATION. THE DEBONDING OF THE WING FABRIC WAS A RESULT OF IMPROPER…

## Other aircraft with N41SW

- [Registered now](https://openairdocs.org/aircraft/N41SW): Surewings BD-4C-S, S/N 1001

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