Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N91MK.
| Tail Number / N-Number | N91MK |
| Manufacturer | KEELEY M/TIDD R |
| Model | MK-1 |
| Year Built | 2008 |
| 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) |
| Engine Manufacturer | VOLKSWAGEN |
| Engine Model | CONVERSION |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 36 hp (27 kW) |
| Type of Registrant | Individual |
| Owner Name | KEELEY MARK E |
| Street | 88 PARROT LN |
| City | FORKLAND |
| State | AL |
| Zip Code | 36740-3536 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2009-02-18 |
| Certificate Issue Date | 2009-02-05 |
| Last Action Date | 2009-02-05 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2018-01-29 |
| Mode S Code | 53112557 |
| Mode S Code Hex | AC956F |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N91MK.
| Tail Number / N-Number | N91MK |
| Manufacturer | CESSNA |
| Model | 180 |
| Manufacturer's Serial Number | 31822 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 121 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | MORRISON KNUDSEN CO INC |
| Street | 411 WEST 5TH ST |
| City | LOS ANGELES |
| State | CA |
| Zip Code | 90001 |
| Region | Western-Pacific |
| Certificate Issue Date | 1956-12-31 |
| Last Status | Valid Registration |
| Cancellation Date | 1958-12-02 |
| Mode S Code | 53112557 |
| Mode S Code Hex | AC956F |