| Tail Number / N-Number | N3665 |
| Manufacturer | CASSUTT |
| Model | IIIM |
| Year Built | 1975 |
| Manufacturer's Serial Number | 45 |
| 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 | CONT MOTOR |
| Engine Model | 0-200 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 100 hp (75 kW) |
| Average Cruising Speed | 112 miles per hour |
| Type of Registrant | Individual |
| Owner Name | BROWN MIKE S |
| Street | 6580 FM 3081 RD |
| City | WILLIS |
| State | TX |
| Zip Code | 77378-2486 |
| Region | Southwestern |
| County | Montgomery County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1980-02-19 |
| Certificate Issue Date | 2014-06-20 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 51022635 |
| Mode S Code Hex | A4259D |