N4021S is not assigned to an aircraft right now: the number is reserved in the FAA registry. The FAA files list 2 earlier registrations of this number, shown below.
Reserved N-number
- Reservation
- Manufacturer temporary number
- Reserved on
- Aug 2, 2019
Earlier registrations of this number
| Canceled | Aircraft | Serial | Year | Exported to | Same airframe today |
|---|---|---|---|---|---|
| Nov 8, 2013 | AYRES CORPORATION S2R-600 | 2561R | 1980 | GUATEMALA | |
| May 23, 1972 | SIKORSKY S-61D | 61497 | ARGENTINA |
NTSB accident and incident records
| Date | Place | Aircraft (as NTSB recorded it) | Damage | Highest injury | NTSB no. |
|---|---|---|---|---|---|
| Aug 3, 2011 | Hazelton, ID | Ayres Corporation S2R-600 | Substantial | None | WPR11LA366 |
From the NTSB aviation accident database (events since 2008, data through Oct 28, 2026), matched by N-number. An N-number can move between aircraft, so each row is checked against the serial number on the current registration.