# N504BT: 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: March 3, 2010
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=504BT
- Page: https://openairdocs.org/aircraft/N504BT

## Aircraft that carried N504BT

- [Cancelled 2010-03-03](https://openairdocs.org/deregistered/N504BT-2010-03-03): Jonker Sailplanes CC JS 1B, S/N 1B-004, built 2008. Exported to South Africa. Owner: [Tate Barton L](https://openairdocs.org/faa-owner/TATE%20BARTON%20L), [Moriarty, NM](https://openairdocs.org/faa-place/NM/Moriarty)

## NTSB investigations on N504BT (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 ERA09CA479](https://openairdocs.org/ntsb/ERA09CA479), Aug 23, 2009: Jonker JS-1B (N504BT), Tullahoma, TN, substantial damage. Probable cause: The pilot's failure to maintain a proper glidepath while on approach, resulting in landing short of the runway.

## FAA accident and incident reports on N504BT (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 20090822016499A](https://openairdocs.org/incident/20090822016499A), Aug 22, 2009: Jonker JS1B (N504BT), Tullahoma, TN, Substantial damage. (-23) Aircraft was not maintained at a sufficient altitude, during turn from base to final, to overcome apparent high negative lift experienced on final. Pilot…

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