N81664 is not currently registered. It was last assigned to a Sikorsky S-61A built in 1961. The FAA cancelled the registration on July 14, 2017. The last status on file was "registration expired, pending cancellation". The number has been on and off the register 3 times.
Sikorsky S-61A cancelled July 14, 2017
- Serial number
- 61063
- Type
- Rotorcraft · Turboshaft
- Year built
- 1961
- Last status
- Registration expired, pending cancellation
- Certificate issued
- September 4, 1997
- Last FAA action
- May 20, 2008
- Last owner
- Carson Helicopters INC (Corporation)
Grants Pass, OR - Airworthiness
- Restricted · Aerial surveying; Forest; Carriage of cargo; Other
Beech B300 cancelled December 12, 1991
- Serial number
- FL52
- Type
- Fixed-wing, multi-engine · Turboprop
- Year built
- —
- Last status
- Valid registration
- Exported to
- Taiwan
- Certificate issued
- November 27, 1991
- Last FAA action
- November 27, 1991
- Last owner
- Rangeflyers INC (Corporation)
Wichita, KS - Airworthiness
- None on file
Aeronca 7AC cancelled October 13, 1955
- Serial number
- 7AC-283
- Type
- Fixed-wing, single engine · Piston (reciprocating)
- Year built
- 1945
- Last status
- Valid registration
- Certificate issued
- July 14, 1951
- Last FAA action
- —
- Last owner
- Dangremond Gordon H (Individual)
Hamilton, MI - Airworthiness
- None on file
NTSB accident and incident record under N81664
Aircraft on the NTSB record: Sikorsky S-61A · serial 61063
The interruption of rotor system drive power due to the input free wheeling unit malfunctioning , and the pilot's operation of the helicopter in the critical area of the height-velocity curve.
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