Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N503D.
| Tail Number / N-Number | N503D |
| Manufacturer | ELY DENNIS R |
| Model | HM-290 |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | ELY DENNIS R |
| Street | 692 GOLDEN OAKS LN |
| City | SANFORD |
| State | FL |
| Zip Code | 32771-8057 |
| Country | US |
| Certificate Issue Date | 2014-11-25 |
| Last Action Date | 2014-11-25 |
| Last Status | Second Notice for Registration Renewal |
| Cancellation Date | 2017-11-14 |
| Mode S Code | 51442540 |
| Mode S Code Hex | A64560 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N503D.
| Tail Number / N-Number | N503D |
| Manufacturer | AIR TRACTOR INC |
| Model | AT-503A |
| Year Built | 1991 |
| Manufacturer's Serial Number | 503A-0067 |
| 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 | P&W |
| Engine Model | PT6A SER |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 750 hp (560 kW) |
| Type of Registrant | Corporation |
| Owner Name | PONTIAC FLYING SERVICE INC |
| Street | 15755 E 2000 NORTH RD |
| City | PONTIAC |
| State | IL |
| Zip Code | 61764-2961 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1991-04-03 |
| Certificate Issue Date | 2002-05-09 |
| Last Action Date | 2008-04-15 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2005-05-12 |
| Mode S Code | 51442540 |
| Mode S Code Hex | A64560 |