# N4129B: 1952 Aero Commander 520, registration cancelled 2012-08-16

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: August 16, 2012
- Status when cancelled: Sale reported, pending cancellation
- Airframe: [Aero Commander 520](https://openairdocs.org/model/aero-commander-520) (registry code 0141202)
- Engine: [Lycoming GO-435C&D series](https://openairdocs.org/engine/lycoming-go-435c-d-series) (registry code 41521)
- Data sheets: [TCDS 6A1](https://openairdocs.org/tcds/6A1) (OpenAirDocs)
- Serial number: 520-33
- Year built: 1952
- Type of aircraft: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard
- Airworthiness date: March 21, 1956
- Last registry action: October 11, 1985
- Mode S code: A4DF23
- Location: [Xxx, OK](https://openairdocs.org/faa-place/OK/Xxx)
- Owner type: Individual
- The mark today: https://openairdocs.org/aircraft/N4129B
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4129B
- Page: https://openairdocs.org/deregistered/N4129B-2012-08-16

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 FTW69F0278](https://openairdocs.org/ntsb/FTW69F0278), Nov 16, 1968: Aero Comdr 520 (N4129B), Dallas, TX, substantial damage

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