N521HB is not currently registered. It was last assigned to a Mcdonnell Douglas Helicopter 500N built in 1998. The FAA cancelled the registration on March 4, 2023. The last status on file was "registration expired, pending cancellation".
N521HB is reserved by a private party since March 4, 2023. Reservation type: Two-year hold for canceled N-numbers.
Mcdonnell Douglas Helicopter 500N cancelled March 4, 2023
- Serial number
- LN084
- Type
- Rotorcraft · Turboshaft
- Year built
- 1998
- Last status
- Registration expired, pending cancellation
- Certificate issued
- November 7, 2016
- Last FAA action
- June 25, 2019
- Last owner
- City Of Huntington Beach (Government)
Huntington Beach, CA - Airworthiness
- Standard · Normal
NTSB accident and incident record under N521HB
Aircraft on the NTSB record: Mcdonnell Douglas 500N · serial LN084
The helicopter’s encounter with unanticipated right yaw during a low-altitude, low-airspeed, tight-radius orbit. Contributing to the accident was the pilot’s distraction during the orbit, which resulted in the loss of control, his fatigue due to his early wake time and time since awakening, and the lack of external cues that hindered his ability to perform a recovery.
Aircraft on the NTSB record: Mcdonnell Douglas Helicopter 500N · serial LN084
The flight instructor's delayed remedial action during the instructional autorotative landing, which resulted in a failure to maintain an adequate rotor rpm to avoid a hard landing.
A tail number passes between aircraft over the years; match the serial number on the NTSB record against the airframe above. Source: NTSB aviation accident database, records through September 30, 2026.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this number on the FAA site