# N51729: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 2
- Last cancelled: April 1, 2013
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=51729
- Page: https://openairdocs.org/aircraft/N51729

## Aircraft that carried N51729

- [Cancelled 2013-04-01](https://openairdocs.org/deregistered/N51729-2013-04-01): Enstrom F-28C, S/N 420, built 1978. Registration expired, pending cancellation. Owner: [Alpine Forest Products Inc](https://openairdocs.org/faa-owner/ALPINE%20FOREST%20PRODUCTS%20INC), [Portland, OR](https://openairdocs.org/faa-place/OR/Portland)
- [Cancelled 1960-06-14](https://openairdocs.org/deregistered/N51729-1960-06-14): Ryan Aeronautical ST3KR, S/N 2117, built 1945. Owner: [Chipukaizer Carl](https://openairdocs.org/faa-owner/CHIPUKAIZER%20CARL), [Scio, OH](https://openairdocs.org/faa-place/OH/Scio)

## NTSB investigations on N51729 (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 SEA90LA116](https://openairdocs.org/ntsb/SEA90LA116), Jun 7, 1990: Enstrom F28C (N51729), Camas, WA, substantial damage. Probable cause: THE FAILURE OF A SPRAG CLUTCH IN THE ROTOR-DRIVE MECHANISM, AT AN ALTITUDE AND POSITION THAT PRECLUDED OR LIMITED THE POSSIBILITY OF A SUCCESSFUL OUTCOME.

## FAA accident and incident reports on N51729 (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 19900606040269A](https://openairdocs.org/incident/19900606040269A), Jun 6, 1990: Enstrm F28C (N51729), Camas, WA, Substantial damage. Lifted off dolly to position other side of fence. Sprague clutch broke disengaging engine to rotors. Crash landed.

---
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.