| Tail Number / N-Number | N121DD |
| Manufacturer | DUGGER DARRELL D |
| Model | MUSTANG II |
| Year Built | 2013 |
| Manufacturer's Serial Number | 12136 |
| 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) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O-320-D3G |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 160 hp (119 kW) |
| Kit Manufacturer | MUSTANG AERONAUTICS |
| Kit Model | MUSTANG II |
| Type of Registrant | Individual |
| Owner Name | ROWLANDS OWEN D |
| Street | 890 E THORPE CT |
| City | PUEBLO WEST |
| State | CO |
| Zip Code | 81007-1256 |
| Region | Northwest Mountain |
| County | Pueblo County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2018-07-19 |
| Certificate Issue Date | 2021-09-15 |
| Last Action Date | 2021-09-15 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 50053670 |
| Mode S Code Hex | A057B8 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N121DD.
| Tail Number / N-Number | N121DD |
| Manufacturer | BURKHART GROB |
| Model | G-109B |
| Manufacturer's Serial Number | 6240 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | 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 | HUNTER DOUGLASS E |
| Street | 167 HIGH STREET |
| City | HAMPTON |
| State | NH |
| Zip Code | 03842 |
| County | Pueblo County |
| Country | US |
| Certificate Issue Date | 1989-07-06 |
| Last Action Date | 1995-09-20 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1996-08-06 |
| Exported To | JAPAN |