| Tail Number / N-Number | N18904 |
| Manufacturer | RYAN AERONAUTICAL |
| Model | ST-A SPECIAL |
| Year Built | 1938 |
| Manufacturer's Serial Number | 188 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | MENASCO |
| Engine Model | PIRATE C4 D4 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 125 hp (93 kW) |
| Average Cruising Speed | 92 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MILLER JAMES L |
| Street | 4733 HARVARD AVE |
| City | KANSAS CITY |
| State | MO |
| Zip Code | 64133-2334 |
| Region | Central |
| County | Jackson County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1960-09-20 |
| Certificate Issue Date | 2007-12-03 |
| Last Action Date | 2022-04-14 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 50262220 |
| Mode S Code Hex | A16490 |