# N6541A: Martens THORP T-18, registration cancelled 1971-11-23

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 23, 1971
- Status when cancelled: Valid registration
- Airframe: [Martens THORP T-18](https://openairdocs.org/model/martens-thorp-t-18) (registry code 89510LA)
- Serial number: 328
- Type of aircraft: Fixed wing single engine
- Certificate issued: July 18, 1967
- Mode S code: A89E12
- Owner when cancelled: [William C Martens](https://openairdocs.org/faa-owner/WILLIAM%20C%20MARTENS)
- Location: [Forworth, TX](https://openairdocs.org/faa-place/TX/Forworth)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N6541A
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=6541A
- Page: https://openairdocs.org/deregistered/N6541A-1971-11-23

From the FAA registry file of November 4, 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 Martens THORP T-18: https://openairdocs.org/model/martens-thorp-t-18.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 FTW68A0075](https://openairdocs.org/ntsb/FTW68A0075), Feb 1, 1968: Thorp T-18 (N6541A), China Springs, TX, destroyed, 1 fatal

## Other aircraft with N6541A

- [Cancelled 2013-02-27](https://openairdocs.org/deregistered/N6541A-2013-02-27): Beech F33A, S/N CE-1011, built 1982. Sale reported, pending cancellation. Owner: [Tigard, OR](https://openairdocs.org/faa-place/OR/Tigard)
- [Cancelled 1980-03-24](https://openairdocs.org/deregistered/N6541A-1980-03-24): Cessna 210N, S/N 210-63549. Exported to South Africa. Owner: [Walston Wings Inc](https://openairdocs.org/faa-owner/WALSTON%20WINGS%20INC), [Olive Branch, MS](https://openairdocs.org/faa-place/MS/Olive%20Branch)
- [Cancelled 1956-05-15](https://openairdocs.org/deregistered/N6541A-1956-05-15): Cessna 180, S/N 32438. Owner: [Cessna Aircraft Co](https://openairdocs.org/faa-owner/CESSNA%20AIRCRAFT%20CO), [Wichita, KS](https://openairdocs.org/faa-place/KS/Wichita)

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