| Tail Number / N-Number | N5603 |
| Manufacturer | HELDEBERG DESIGNS LLC |
| Model | MARATHON 2002 |
| Year Built | 2002 |
| Manufacturer's Serial Number | HD02070M |
| Aircraft Type | Powered Parachute |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 582SER |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Type of Registrant | Individual |
| Owner Name | WERREN CARROLL E |
| Street | 152 BLACK HALL RD |
| City | EPSOM |
| State | NH |
| Zip Code | 03234-4344 |
| Region | New England |
| County | Merrimack County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2010-01-20 |
| Certificate Issue Date | 2022-09-20 |
| Last Action Date | 2022-09-20 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 51624653 |
| Mode S Code Hex | A729AB |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N5603.
| Tail Number / N-Number | N5603 |
| Manufacturer | CONVAIR |
| Model | 30A |
| Manufacturer's Serial Number | 30A13 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 152 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 4 engines |
| Average Cruising Speed | 468 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MODERN AIR TRANSPORT INC |
| Street | PO BOX 627 IAB |
| City | MIAMI |
| State | FL |
| Zip Code | 33148 |
| Region | Southern |
| County | Merrimack County |
| Certificate Issue Date | 1969-09-22 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-08-27 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N5603.
| Tail Number / N-Number | N5603 |
| Manufacturer | CONVAIR |
| Model | 30A |
| Manufacturer's Serial Number | 35 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 152 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 4 engines |
| Average Cruising Speed | 468 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AMERICAN AIRLINES INC |
| Street | 633 THIRD AVENUE |
| City | NEW YORK |
| State | NY |
| Zip Code | 10001 |
| Region | Eastern |
| County | Merrimack County |
| Certificate Issue Date | 1963-02-27 |
| Last Status | Valid Registration |
| Cancellation Date | 1963-02-27 |