# N9571: Bell 47G-4A, registration cancelled 2026-04-09

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 9, 2026
- Status when cancelled: Valid registration
- Airframe: [Bell 47G-4A](https://openairdocs.org/model/bell-47g-4a) (registry code 1181031)
- Engine: [Lycoming VO-540 series](https://openairdocs.org/engine/lycoming-vo-540-series) (registry code 41534)
- Data sheets: [TCDS 2H3](https://openairdocs.org/tcds/2H3), [TCDS E-304](https://openairdocs.org/tcds/E-304) (OpenAirDocs)
- Serial number: 7504
- Type of aircraft: Rotorcraft
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Certificate issued: March 15, 2021
- Last registry action: April 28, 2023
- Mode S code: AD5123
- Owner when cancelled: [Porter Robert A](https://openairdocs.org/faa-owner/PORTER%20ROBERT%20A)
- Location: [Anacortes, WA](https://openairdocs.org/faa-place/WA/Anacortes)
- Owner type: Individual
- Owner's area on the map: 48.4528° N, 122.5950° W: Placed by OpenAirDocs at the center of ZIP code 98221, within about 4 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N9571
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=9571
- Page: https://openairdocs.org/deregistered/N9571-2026-04-09

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 Bell 47G-4A: https://openairdocs.org/model/bell-47g-4a.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 SEA97LA191](https://openairdocs.org/ntsb/SEA97LA191), Aug 17, 1997: Bell 47G (N9571), Wellpinit, WA, substantial damage. Probable cause: The pilot's selection of an unsuitable landing site, and his failure to maintain rotor blade clearance from terrain during landing.

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19970817025889A](https://openairdocs.org/incident/19970817025889A), Aug 17, 1997: Bell 47G4A (N9571), Wellpinit, WA, Substantial damage. (.19) On August 17, 1997, about 1420 pacific daylight time, N9571, a Bell 47G helicopter, operated by the owner/pilot, impacted terrain and was substantially…

---
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.