# N4573A: Messerschmitt-Boelkow-Blohm BO-105S, registration cancelled 1991-04-29

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 29, 1991
- Exported to: Norway
- Status when cancelled: Valid registration
- Airframe: [Messerschmitt-Boelkow-Blohm BO-105S](https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s) (registry code 5626006)
- Data sheets: [TCDS H3EU](https://openairdocs.org/tcds/H3EU) (OpenAirDocs)
- Serial number: S666
- Type of aircraft: Rotorcraft
- Last registry action: January 7, 1991
- Mode S code: A58EDF
- Owners when cancelled: [Sold To Air Siesta](https://openairdocs.org/faa-owner/SOLD%20TO%20AIR%20SIESTA)
- Location: [Mcallen, TX](https://openairdocs.org/faa-place/TX/Mcallen)
- Owner type: Individual
- Owner's area on the map: 26.1608° N, 98.2451° W: Placed by OpenAirDocs at the center of ZIP code 78503, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4573A
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4573A
- Page: https://openairdocs.org/deregistered/N4573A-1991-04-29

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 Messerschmitt-Boelkow-Blohm BO-105S: https://openairdocs.org/model/messerschmitt-boelkow-blohm-bo-105s.md

## Other aircraft with N4573A

- [Cancelled 1971-01-04](https://openairdocs.org/deregistered/N4573A-1971-01-04): Piper PA-18A 150, S/N 18-4878, built 1956. Owner: [Dockery J O](https://openairdocs.org/faa-owner/DOCKERY%20J%20O), [Clarksdale, MS](https://openairdocs.org/faa-place/MS/Clarksdale)

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