| Tail Number / N-Number | N89SK |
| Manufacturer | KUENZI STEVE |
| Model | CASSUTT III M |
| Year Built | 1990 |
| Manufacturer's Serial Number | 001 |
| 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 | LYCOMING |
| Engine Model | IO-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 150 hp (112 kW) |
| Type of Registrant | Individual |
| Owner Name | KUENZI STEVEN M |
| Street | 18 LADY OF THE MOUNTAIN RD |
| City | ALAMOGORDO |
| State | NM |
| Zip Code | 88310-9506 |
| Region | Southwestern |
| County | Otero County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1990-10-12 |
| Certificate Issue Date | 1989-08-04 |
| Last Action Date | 2021-01-24 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 53042225 |
| Mode S Code Hex | AC4495 |