| Tail Number / N-Number | N6504D |
| Manufacturer | LANCAIR COMPANY |
| Model | LC42-550FG |
| Manufacturer's Serial Number | 42035 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-550 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | LLC |
| Owner Name | AGGIE RENTALS LLC |
| Street | 302 N LAST CHANCE GULCH 409 |
| City | HELENA |
| State | MT |
| Zip Code | 59601 |
| Region | Northwest Mountain |
| County | Lewis and Clark County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2003-12-23 |
| Certificate Issue Date | 2023-01-05 |
| Last Action Date | 2023-01-05 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 52107642 |
| Mode S Code Hex | A88FA2 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N6504D.
| Tail Number / N-Number | N6504D |
| Manufacturer | BRENNAN EDWARD J B JR |
| Model | BRENNAN SPECIAL |
| Manufacturer's Serial Number | 2 |
| 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 | BENNAN EDWRD J JR |
| Street | 24049 FRANK AVE |
| City | NORTH OLMSTEAD |
| State | OH |
| Zip Code | 44070 |
| Region | Great Lakes |
| County | Lewis and Clark County |
| Certificate Issue Date | 1960-08-10 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-08-03 |
| Exported To | CANADA |