| Tail Number / N-Number | N504 |
| Manufacturer | SIKORSKY |
| Model | S58E |
| Year Built | 1957 |
| Manufacturer's Serial Number | 57-1717 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 14 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | WRIGHT |
| Engine Model | R-1820 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 1,475 hp (1,100 kW) |
| Average Cruising Speed | 81 miles per hour |
| Type of Registrant | LLC |
| Owner Name | VI 1 LLC |
| Street | PO BOX 735 |
| City | BREWSTER |
| State | WA |
| Zip Code | 98812-0735 |
| Region | Northwest Mountain |
| County | Okanogan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1982-08-10 |
| Certificate Issue Date | 2015-06-10 |
| Last Action Date | 2021-01-28 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 51444313 |
| Mode S Code Hex | A648CB |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N504.
| Tail Number / N-Number | N504 |
| Manufacturer | SUD AVIATION |
| Model | SE3130 ALOUETTE II |
| Manufacturer's Serial Number | 1085 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Partnership |
| Owner Name | SANDERS AVIATION COMPANY |
| Street | BYWATER ROAD |
| City | ANNAPOLIS |
| State | MD |
| Zip Code | 21401 |
| Region | Eastern |
| County | Okanogan County |
| Certificate Issue Date | 1968-07-23 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-06-19 |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N504.
| Tail Number / N-Number | N504 |
| Manufacturer | CESSNA |
| Model | T-50 |
| Manufacturer's Serial Number | 4449 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 131 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | DARTMOUTH AIRWAYS INC |
| Street | GENERAL DELIVERY |
| City | HANOVER |
| State | NH |
| Zip Code | 03755 |
| Region | New England |
| County | Okanogan County |
| Certificate Issue Date | 1946-04-10 |
| Last Status | Valid Registration |
| Cancellation Date | 1948-03-31 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N504.
| Tail Number / N-Number | N504 |
| Manufacturer | ROBINSON /CHRISTENSEN /WRIGHT |
| Model | FIREFLY |
| Manufacturer's Serial Number | CRW-1 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Partnership |
| Owner Name | MESSRS J ROBINSON |
| Street | 1723 WEST 39TH PLACE |
| City | LOS ANGELES |
| State | CA |
| Zip Code | 90001 |
| Region | Western-Pacific |
| County | Okanogan County |
| Certificate Issue Date | 1929-02-09 |
| Last Status | Valid Registration |
| Cancellation Date | 1930-03-14 |