# N4009D: 1979 Ayres S2R-600, registration cancelled 2012-11-15

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: November 15, 2012
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Ayres S2R-600](https://openairdocs.org/model/ayres-s2r-600) (registry code 0970102)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Serial number: 2525R
- Year built: 1979
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: June 8, 1979
- Certificate issued: July 24, 1982
- Last registry action: April 21, 2009
- Mode S code: A4B038
- Owners when cancelled: [Helm Lanny DBA](https://openairdocs.org/faa-owner/HELM%20LANNY%20DBA), [Helm Flying Service](https://openairdocs.org/faa-owner/HELM%20FLYING%20SERVICE)
- Location: [Harvey, ND](https://openairdocs.org/faa-place/ND/Harvey)
- Owner type: Individual
- Owner's area on the map: 47.7676° N, 99.8767° W: Placed by OpenAirDocs at the center of ZIP code 58341, within about 12 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N4009D
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=4009D
- Page: https://openairdocs.org/deregistered/N4009D-2012-11-15

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 Ayres S2R-600: https://openairdocs.org/model/ayres-s2r-600.md

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.