# N521ZZ: Hughes Helicopters HUGHES 369D, registration cancelled 1998-04-01

- Type: Cancelled registration (FAA registry, deregistered aircraft)
- Cancelled: April 1, 1998
- Status when cancelled: Triennial form not returned
- 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: 970190D
- Type of aircraft: Rotorcraft
- Certificate issued: February 2, 1995
- Last registry action: January 21, 1998
- Mode S code: A68EFC
- Owner when cancelled: [Big Eye Helicopters Inc](https://openairdocs.org/faa-owner/BIG%20EYE%20HELICOPTERS%20INC)
- Location: Tumon, GU, Guam
- Physical address: Tumon, Equatorial Guinea
- Owner type: Corporation
- The mark today: https://openairdocs.org/aircraft/N521ZZ
- FAA registry: https://registry.faa.gov/AircraftInquiry/Search/NNumberResult?nNumberTxt=521ZZ
- Page: https://openairdocs.org/deregistered/N521ZZ-1998-04-01

From the FAA registry file of November 5, 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 LAX98LA079](https://openairdocs.org/ntsb/LAX98LA079), Jan 24, 1998: Hughes 369D (N521ZZ), Pacific Ocean (Pacific Ocean), destroyed, 1 fatal. Probable cause: The pilot's failure to adequately compensate for the wind condition and failure to maintain a proper rate of descent which resulted in the inadvertent loss of tail rotor effectiveness during a…

## 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 19980124000609A](https://openairdocs.org/incident/19980124000609A), Jan 24, 1998: Hughes 369D (N521ZZ), Pacific Ocean, BP, Destroyed, 1 fatal. On January 24, 1998, at 1300 hours saipan standard time, a hughtes 369D, N521ZZ, operated by big eye helicopters, inc., guam, crashed into international south…

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