| Tail Number / N-Number | N231LK |
| Manufacturer | ANTON H NERAD II |
| Model | SONEX SUBSONEX JSX-2 |
| Year Built | 2019 |
| Manufacturer's Serial Number | JSX0011 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | PBS VELKA |
| Engine Model | TJ100 |
| Engine Type | Turbo-jet |
| Number of Engines | 1 engine |
| Thrust | 1,250 pounds-force (5.6 kN) |
| Kit Manufacturer | SONEX AIRCRAFT LLC |
| Kit Model | SUBSONEX JSX-2 |
| Type of Registrant | Individual |
| Owner Name | NERAD ANTON H II |
| Street | 8208 SILVERLINE DR |
| City | FAIRFAX STATION |
| State | VA |
| Zip Code | 22039-3000 |
| Region | Eastern |
| County | Fairfax city |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2019-06-02 |
| Certificate Issue Date | 2018-08-30 |
| Last Action Date | 2021-07-22 |
| Expiration Date | 2028-08-31 |
| Status | Valid Registration |
| Mode S Code | 50406473 |
| Mode S Code Hex | A20D3B |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N231LK.
| Tail Number / N-Number | N231LK |
| Manufacturer | MOONEY AIRCRAFT CORP. |
| Model | M20K |
| Year Built | 1980 |
| Manufacturer's Serial Number | 25-0298 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | TSIO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 225 hp (168 kW) |
| Type of Registrant | Corporation |
| Owner Name | KNICKERBOCKER AVIATION INC |
| Street | 419 S 3RD ST STE 302 |
| City | PHILADELPHIA |
| State | PA |
| Zip Code | 19147-1622 |
| County | Fairfax city |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1980-01-11 |
| Certificate Issue Date | 2003-11-22 |
| Last Action Date | 2006-12-29 |
| Last Status | Second Triennial Aircraft Registration Form has been mailed and has not been returned by the Post Office |
| Cancellation Date | 2007-04-12 |