| Tail Number / N-Number | N3688A |
| Manufacturer | PIPER |
| Model | PA-18-135 |
| Year Built | 1953 |
| Manufacturer's Serial Number | 18-3036 |
| 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 | LYCOMING |
| Engine Model | 0-290 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 140 hp (104 kW) |
| Average Cruising Speed | 97 miles per hour |
| Type of Registrant | Individual |
| Owner Name | KJELSRUD GARY L |
| Street | 5200 13TH ST S |
| City | GREAT FALLS |
| State | MT |
| Zip Code | 59405-8201 |
| Region | Northwest Mountain |
| County | Cascade County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Multiple |
| Airworthiness Date | 1956-05-06 |
| Certificate Issue Date | 1995-11-14 |
| Last Action Date | 2021-05-19 |
| Expiration Date | 2028-10-31 |
| Status | Valid Registration |
| Mode S Code | 51026565 |
| Mode S Code Hex | A42D75 |