# N3940X: not currently registered

- Registered now: No (not in the FAA registry file). The mark may be reserved or free to assign
- Earlier aircraft: 1
- Last cancelled: February 20, 1992
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=3940X
- Page: https://openairdocs.org/aircraft/N3940X

## Aircraft that carried N3940X

- [Cancelled 1992-02-20](https://openairdocs.org/deregistered/N3940X-1992-02-20): Piper PA-28R-200, S/N 28R7535361. Triennial form not returned. Owner: [Stillwater Flight Center Inc](https://openairdocs.org/faa-owner/STILLWATER%20FLIGHT%20CENTER%20INC), [Stillwater, OK](https://openairdocs.org/faa-place/OK/Stillwater)

## NTSB investigations on N3940X (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 FTW89LA098](https://openairdocs.org/ntsb/FTW89LA098), May 24, 1989: Piper PA-28R-200 (N3940X), Edmond, OK, substantial damage. Probable cause: IMPROPER MAINTENANCE PERFORMED BY THE COMPANY MECHANIC WHO FAILED TO TIGHTEN THE OIL SUMP PLUG, AND ALSO FAILED TO SAFETY IT.

## FAA accident and incident reports on N3940X (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 19890523013959A](https://openairdocs.org/incident/19890523013959A), May 23, 1989: Piper PA28R200 (N3940X), Edmond, OK, Substantial damage. Engine lost oil pressure and quit. Struck a fence on forced landing. Oil sump plug was missing not saftied.

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