| Tail Number / N-Number | N555LL |
| Manufacturer | YAKOVLEV |
| Model | YAK-55M |
| Manufacturer's Serial Number | 950909 |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Type of Registrant | LLC |
| Owner Name | MIDDAUGH FLIERS LLC |
| Street | 7002 E CHATTAROY RD |
| City | CHATTAROY |
| State | WA |
| Zip Code | 99003-8718 |
| Region | Northwest Mountain |
| County | Spokane County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1996-02-28 |
| Certificate Issue Date | 2004-03-31 |
| Last Action Date | 2022-07-04 |
| Expiration Date | 2029-11-30 |
| Status | Valid Registration |
| Mode S Code | 51611403 |
| Mode S Code Hex | A71303 |