# N94MW: 1985 Welch Marshal JR KOLB TWINSTAR, registration cancelled 2013-10-28

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: October 28, 2013
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Welch Marshal JR KOLB TWINSTAR](https://openairdocs.org/model/welch-marshal-jr-kolb-twinstar) (registry code 05613SG)
- Engine: [Bombardier ROTAX (ALL)](https://openairdocs.org/engine/bombardier-rotax-all) (registry code 09050)
- Serial number: A-1
- Year built: 1985
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Experimental, amateur built
- Airworthiness date: September 11, 1985
- Certificate issued: July 12, 1985
- Last registry action: August 18, 2009
- Mode S code: AD0BF7
- Owner when cancelled: [Welch Marshall Jr](https://openairdocs.org/faa-owner/WELCH%20MARSHALL%20JR)
- Location: [Williamsport, PA](https://openairdocs.org/faa-place/PA/Williamsport)
- Owner type: Individual
- Owner's area on the map: 41.3450° N, 76.8572° W: Placed by OpenAirDocs at the center of ZIP code 17701, within about 6 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N94MW
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=94MW
- Page: https://openairdocs.org/deregistered/N94MW-2013-10-28

From the FAA registry file of November 5, 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 Welch Marshal JR KOLB TWINSTAR: https://openairdocs.org/model/welch-marshal-jr-kolb-twinstar.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 NYC91DGT02](https://openairdocs.org/ntsb/NYC91DGT02), May 5, 1991: Kolb Twinstar (N94MW), Williamsport, PA, substantial damage. Probable cause: AN ENGINE SEIZURE AS THE RESULT OF OVERHEATING.

## 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 19910505014269A](https://openairdocs.org/incident/19910505014269A), May 5, 1991: Amtrkb TWINSTAR (N94MW), Williamsport, PA, Substantial damage. Engine lost power. Crash landed in trees.

## Other aircraft with N94MW

- [Registered now](https://openairdocs.org/aircraft/N94MW): Mark W Woodring ZENITH 701, S/N 7-10929, built 2020

---
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.