| Tail Number / N-Number | N231SJ |
| Manufacturer | MOONEY AIRCRAFT CORP. |
| Model | M20K |
| Year Built | 1979 |
| Manufacturer's Serial Number | 25-0262 |
| 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 | Individual |
| Owner Name | BRENNAN JOHN P JR |
| Street | 65 SOUTH ST |
| City | SOUTH EASTON |
| State | MA |
| Zip Code | 02375-1302 |
| Region | New England |
| County | Bristol County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1979-12-06 |
| Certificate Issue Date | 2004-02-12 |
| Last Action Date | 2022-09-29 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 50406720 |
| Mode S Code Hex | A20DD0 |