# N446TN: Hughes Helicopters HUGHES 369D, registration cancelled 1990-07-09

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: July 9, 1990
- Status when cancelled: N-number assigned, not yet registered
- Airframe: [Hughes Helicopters HUGHES 369D](https://openairdocs.org/model/hughes-helicopters-hughes-369d) (registry code 4470706)
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) (OpenAirDocs)
- Serial number: 1211037D
- Type of aircraft: Rotorcraft
- Mode S code: A5629D
- The mark today: https://openairdocs.org/aircraft/N446TN
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=446TN
- Page: https://openairdocs.org/deregistered/N446TN-1990-07-09

From the FAA registry file of October 31, 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 Hughes Helicopters HUGHES 369D: https://openairdocs.org/model/hughes-helicopters-hughes-369d.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 SEA90LA023](https://openairdocs.org/ntsb/SEA90LA023), Nov 29, 1989: Hughes 369D (N446TN), Stayton, OR, substantial damage. Probable cause: THE MAINTENANCE PERSONNEL FAILED TO RECORD THE PREVIOUS FLIGHT TIME FOR THE OVERRUNNING CLUTCH ON AIRWORTHINESS CERTIFICATION DOCUMENTS WHEN THE ASSEMBLY WAS OVERHAULED. ALSO, CAUSAL TO THE ACCIDENT…

## 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 19891129047789A](https://openairdocs.org/incident/19891129047789A), Nov 29, 1989: Hughes 369D (N446TN), Stayton, OR, Substantial damage. Loud bang lost rotor RPM, settled, chopped tail boom. Spray clutch failed.

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