| Tail Number / N-Number | N31209 |
| Manufacturer | COMMONWEALTH |
| Model | 185 |
| Year Built | 1946 |
| Manufacturer's Serial Number | 1812 |
| 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 | CONT MOTOR |
| Engine Model | C85 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 85 hp (63 kW) |
| Average Cruising Speed | 86 miles per hour |
| Type of Registrant | Partnership |
| Owner Name | HOCKENSON ROY D |
| Other Names |
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| Street | 3443 1/2 ACADEMY DR SE |
| City | AUBURN |
| State | WA |
| Zip Code | 98092-7340 |
| Region | Northwest Mountain |
| County | King County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-07-10 |
| Certificate Issue Date | 2013-02-04 |
| Last Action Date | 2022-01-28 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 50650271 |
| Mode S Code Hex | A350B9 |