# N3645D: 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: November 20, 1991
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=3645D
- Page: https://openairdocs.org/aircraft/N3645D

## Aircraft that carried N3645D

- [Cancelled 1991-11-20](https://openairdocs.org/deregistered/N3645D-1991-11-20): Piper AEROSTAR 601, S/N 6108448162153. Triennial form not returned. Owner: [W W Aviation Inc](https://openairdocs.org/faa-owner/W%20W%20AVIATION%20INC), [Woolrich, PA](https://openairdocs.org/faa-place/PA/Woolrich)

## NTSB investigations on N3645D (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 DCA91MA031](https://openairdocs.org/ntsb/DCA91MA031), Apr 4, 1991: Piper Aerostar 601 (N3645D), Merion, PA, destroyed, 7 fatal. Probable cause: THE POOR JUDGEMENT BY THE CAPTAIN OF THE AIRPLANE TO PERMIT THE IN-FLIGHT INSPECTION AFTER HE HAD DETERMINED TO THE BEST OF HIS ABILITY THAT THE NOSE LANDING GEAR WAS FULLY EXTENDED, THE POOR…

## FAA accident and incident reports on N3645D (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 19910404008912A](https://openairdocs.org/incident/19910404008912A), Apr 4, 1991: Piper PA60601 (N3645D), Philadelphia, PA, Destroyed, 5 fatal. Was struck from below by N78S that was trying to check nose gear down. Both crashed. Judgement and skill factors.

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