| Tail Number / N-Number | N4103 |
| Manufacturer | MOONEY |
| Model | M-18LA |
| Year Built | 1953 |
| Manufacturer's Serial Number | 137 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 | 0-145B SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Average Cruising Speed | 103 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | PORT TOWNSEND AERO MUSEUM |
| Street | 105 AIRPORT RD |
| City | PORT TOWNSEND |
| State | WA |
| Zip Code | 98368-9716 |
| Region | Northwest Mountain |
| County | Jefferson County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1955-06-30 |
| Certificate Issue Date | 2018-05-16 |
| Last Action Date | 2020-12-30 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 51153341 |
| Mode S Code Hex | A4D6E1 |