# N1539U: 1992 Air Tractor AT-401, registration cancelled 2021-05-08

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: May 8, 2021
- Status when cancelled: Registration expired, pending cancellation
- Airframe: [Air Tractor AT-401](https://openairdocs.org/model/air-tractor-at-401) (registry code 0390204)
- Engine: [Pratt & Whitney R1340 series](https://openairdocs.org/engine/pratt-whitney-r1340-series) (registry code 52016)
- Data sheets: [TCDS A17SW](https://openairdocs.org/tcds/A17SW) (OpenAirDocs)
- Serial number: 401-0863
- Year built: 1992
- Type of aircraft: Fixed wing single engine
- Engine type: Reciprocating
- Airworthiness: Restricted, agriculture and pest control
- Airworthiness date: April 9, 1992
- Certificate issued: June 14, 2010
- Last registry action: April 6, 2018
- Mode S code: A0D8FA
- Owner when cancelled: [Kafer-Stone Applicator Service Inc](https://openairdocs.org/faa-owner/KAFER-STONE%20APPLICATOR%20SERVICE%20INC)
- Location: [Omro, WI](https://openairdocs.org/faa-place/WI/Omro)
- Owner type: Corporation
- Owner's area on the map: 44.0439° N, 88.7730° W: Placed by OpenAirDocs at the center of ZIP code 54963, within about 5 miles (OpenAirDocs). The owner's mailing address, not where the aircraft was based
- The mark today: https://openairdocs.org/aircraft/N1539U
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=1539U
- Page: https://openairdocs.org/deregistered/N1539U-2021-05-08

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 Air Tractor AT-401: https://openairdocs.org/model/air-tractor-at-401.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 CEN15LA345](https://openairdocs.org/ntsb/CEN15LA345), Aug 5, 2015: Air Tractor AT 401 (N1539U), Nekoosa, WI, substantial damage. Probable cause: The pilot’s inadequate preflight planning, which resulted in his attempt to take off for the agricultural application flight with the airplane over its maximum gross weight in high-density altitude…

## 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 20150805014859A](https://openairdocs.org/incident/20150805014859A), Aug 5, 2015: Air Tractor Inc AT-401 (N1539U), Nekoosa, WI, Substantial damage. Pilot stated on takeoff roll, aircraft tail came up then settled but continued take off to rotation. Aircraft settled to ground departing ground effect.…

## Other aircraft with N1539U

- [Cancelled 1988-05-20](https://openairdocs.org/deregistered/N1539U-1988-05-20): Cessna TU206F, S/N U20602247. N-number assigned, not yet registered

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