# N4172B: 1953 Aero Commander 520, registration cancelled 2014-10-06

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: October 6, 2014
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202)
- Engine: [Lycoming GO-435](https://openairdocs.org/engine/lycoming-go-435) (registry code 41520)
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1), [TCDS E-228](https://openairdocs.org/tcds/E-228) (OpenAirDocs)
- Serial number: 520-78
- Year built: 1953
- Type of aircraft: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: July 23, 1955
- Certificate issued: February 24, 1975
- Last registry action: October 31, 2007
- Mode S code: A4F0C1
- Owner when cancelled: [National Financing Corp](https://openairdocs.org/faa-owner/NATIONAL%20FINANCING%20CORP)
- Location: [Wilmington, DE](https://openairdocs.org/faa-place/DE/Wilmington)
- Owner type: Corporation
- Owner's area on the map: 39.7357° N, 75.5321° W: Placed by OpenAirDocs: center of Wilmington, DE, within about 2 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4172B
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4172B
- Page: https://openairdocs.org/deregistered/N4172B-2014-10-06

From the FAA registry file of October 29, 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 Aero Commander 520: https://openairdocs.org/model/aero-commander-520.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 UNK65X0610](https://openairdocs.org/ntsb/UNK65X0610), Nov 8, 1964: Aero Cmdr 520 (N4172B), Chicago, IL, substantial damage

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