| Tail Number / N-Number | N21MM |
| Manufacturer | MELANSON MARVIN |
| Model | CASSUTT III M |
| Year Built | 1995 |
| Manufacturer's Serial Number | 002 |
| 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) |
| Type of Registrant | Individual |
| Owner Name | MELANSON MARVIN C |
| Street | 4724 E AYERS RD |
| City | SAGINAW |
| State | MN |
| Zip Code | 55779 |
| Region | Great Lakes |
| County | St. Louis County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1995-09-21 |
| Certificate Issue Date | 1995-09-01 |
| Last Action Date | 2021-03-22 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 50334110 |
| Mode S Code Hex | A1B848 |