Cessna S550
N633AT is a Cessna S550, a fixed-wing airplane with more than one motor with turbofan engines, built in 1985. It has 8 seats. It is registered to Nrx Pharmaceuticals INC, a corporation in Wilmington, Delaware. The registration is valid: it was issued on September 9, 2026 and expires on September 30, 2033. It holds a standard airworthiness certificate for transport, dated September 19, 1985. 1 document is on file: loan or lien (security agreement).
Aircraft
- Maker
- Cessna
- Model
- S550 · all S550s and related versions
- Serial number
- S550-0066
- Type
- Fixed-wing, multi-engine
- Power
- Turbofan, 2 motors
- Seats
- 8
- Year built
- 1985
- Transponder code
- A848F3 (octal 52044363)
Registration
- Status
- Valid registration
- Certificate issued
- September 9, 2026
- Expires
- September 30, 2033
- Last FAA action
- September 9, 2026
- Airworthiness
- Standard · Transport · September 19, 1985
- FAA region
- Eastern
- FAA record id
- 00460336
Owner as the FAA publishes it
- Name
- Nrx Pharmaceuticals INC
- Type
- Corporation
- Address
- 1201 N Orange St
Wilmington, DE 19801-1155
Owners can ask the FAA to withhold their name and address from public files. When they do, those fields are blank here as well. How that works.
Documents on file 1
Earlier use of this number 1
Records check free · 2 to understand · 4 clear
The public federal record on N633AT, read the way a buyer, lender or insurer reads it: FAA registration, prior tail numbers keyed on the serial number, reuse of the tail number, recent registry filings, and the NTSB accident record under this and every earlier registration.
Valid registration to Nrx Pharmaceuticals INC, a corporation, certificate issued September 9, 2026, expires September 30, 2033. No fractional interest recorded. [1]
Standard certificate for transport, dated September 19, 1985, consistent with the 1985 manufacture year. [1]
No earlier tail number is recorded against serial S550-0066 for this model in the deregistered file. [2]
N633AT was previously assigned to 1 other aircraft: Cessna 500 (serial 500-0087, cancelled March 28, 2024). Histories keyed to the tail number alone can mix aircraft up; this check keys on the serial number. [2]
1 loan or lien document received by the registry recently (September 28, 2026). The full title and lien picture is in the FAA aircraft records file. [3]
No NTSB investigation records located under N633AT. CLEAR means the query ran and returned nothing, not that nothing ever happened. [4]
These live in the FAA aircraft records file (every document ever filed against the aircraft) and, for larger aircraft, the International Registry. Part of the full report.
AD compliance against the logbooks and flight-activity reconciliation are researched layers of the full report.
- FAA Releasable Aircraft Database, master file, file of October 2, 2026. registry.faa.gov/
- FAA deregistered aircraft file (part of the same download), file of October 2, 2026. registry.faa.gov/
- FAA document index: registry documents received in recent weeks, file of October 2, 2026. registry.faa.gov/
- NTSB aviation accident database (CAROL), records through August 27, 2026. data.ntsb.gov/carol-main-public/basic-search
This automated check reads the public federal record. Nothing here is a legal opinion, an appraisal or a statement about the aircraft's condition; a CLEAR line is a statement about the searched record, not the aircraft.
Source: FAA Civil Aviation Registry, Releasable Aircraft Database, October 2, 2026. See this record on the FAA site · This record as data