| Tail Number / N-Number | N51906 |
| Manufacturer | BOEING |
| Model | A75N1(PT17) |
| Year Built | 1941 |
| Manufacturer's Serial Number | 75-2517 |
| 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 | R670-SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 225 hp (168 kW) |
| Average Cruising Speed | 93 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MCGRATH WILLIAM F JR |
| Street | PO BOX 2639 |
| City | NANTUCKET |
| State | MA |
| Zip Code | 02584-2639 |
| Region | New England |
| County | Nantucket County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1956-05-11 |
| Certificate Issue Date | 2003-02-25 |
| Last Action Date | 2022-05-16 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 51502525 |
| Mode S Code Hex | A68555 |