| Tail Number / N-Number | N221DP |
| Manufacturer | BEECH |
| Model | 36 |
| Year Built | 1968 |
| Manufacturer's Serial Number | E-6 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 285 hp (213 kW) |
| Average Cruising Speed | 138 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MCKENNEY BRET K |
| Street | 1426 ROSEBUD LN |
| City | BILLINGS |
| State | MT |
| Zip Code | 59101-6526 |
| Region | Northwest Mountain |
| County | Yellowstone County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1968-05-24 |
| Certificate Issue Date | 2021-06-16 |
| Last Action Date | 2021-06-16 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 50362421 |
| Mode S Code Hex | A1E511 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N221DP.
| Tail Number / N-Number | N221DP |
| Manufacturer | SKILLMAN G. LEE |
| Model | THORP T-18 |
| Manufacturer's Serial Number | 294 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Individual |
| Owner Name | WAAGE THOMAS C |
| Street | 57 WINTER HOME RD PO BOX 475 |
| City | WEST CHATHAM |
| State | MA |
| Zip Code | 02669 |
| County | Yellowstone County |
| Country | US |
| Certificate Issue Date | 1991-07-17 |
| Last Action Date | 1991-07-19 |
| Last Status | Valid Registration |
| Cancellation Date | 1993-11-17 |