# N5423V: 1988 Knepp Clarence E TWINSTAR MARK II, registration cancelled 2010-04-05

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 5, 2010
- Status when cancelled: Triennial form not returned
- Airframe: [Knepp Clarence E TWINSTAR MARK II](https://openairdocs.org/model/knepp-clarence-e-twinstar-mark-ii) (registry code 05612VF)
- Engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050)
- Serial number: TS0118
- Year built: 1988
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 7, 1989
- Certificate issued: May 23, 1988
- Last registry action: February 16, 2010
- Mode S code: A6E22F
- Owner when cancelled: [Knepp Clarence E](https://openairdocs.org/faa-owner/KNEPP%20CLARENCE%20E)
- Location: [Gilbertsville, PA](https://openairdocs.org/faa-place/PA/Gilbertsville)
- Owner type: Individual
- Owner's area on the map: 40.3088° N, 75.5861° W: Placed by OpenAirDocs at the center of ZIP code 19525, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N5423V
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=5423V
- Page: https://openairdocs.org/deregistered/N5423V-2010-04-05

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 Knepp Clarence E TWINSTAR MARK II: https://openairdocs.org/model/knepp-clarence-e-twinstar-mark-ii.md

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