# N500AB: Cessna 421B, registration cancelled 2016-03-16

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: March 16, 2016
- Status when cancelled: Valid registration
- Airframe: [Cessna 421B](https://openairdocs.org/model/cessna-421b) (registry code 2076014)
- Engine: [Continental GTSIO-520-C](https://openairdocs.org/engine/continental-gtsio-520-c) (registry code 17035)
- Data sheets: [TCDS A7CE](https://openairdocs.org/tcds/A7CE), [TCDS E7CE](https://openairdocs.org/tcds/E7CE) (OpenAirDocs)
- Serial number: 421B0369
- Type of aircraft: Fixed wing multi engine
- Engine type: Reciprocating
- Airworthiness: Standard, normal
- Airworthiness date: March 8, 1973
- Certificate issued: January 5, 2016
- Last registry action: January 5, 2016
- Mode S code: A639F2
- Owner when cancelled: [Graves Aircraft Inc](https://openairdocs.org/faa-owner/GRAVES%20AIRCRAFT%20INC)
- Location: [El Reno, OK](https://openairdocs.org/faa-place/OK/El%20Reno)
- Owner type: Corporation
- Owner's area on the map: 35.5062° N, 97.9586° W: Placed by OpenAirDocs at the center of ZIP code 73036, within about 8 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N500AB
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=500AB
- Page: https://openairdocs.org/deregistered/N500AB-2016-03-16

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 Cessna 421B: https://openairdocs.org/model/cessna-421b.md

## Service difficulty reports (1)

Matched to this aircraft by N-number and event date, checked against the reported serial number, make and model.

- [SDR 2000ZZZX232](https://openairdocs.org/sdr/2000ZZZX232), Nov 18, 1999: NUT. CRACKED. FOUND LOWER FORWARD ENGINE CASE THROUGH-BOLT NUT (LEFT) CRACKED ENTIRELY THROUGH. THIS IS THE NEW TWELVE POINT FLANGED NUT REQUIRED BY TELEDYNE CONT M92-9.

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