Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N9988K.
| Tail Number / N-Number | N9988K |
| Manufacturer | KNIGHT MARK |
| Model | KNIGHT RYDER I |
| Year Built | 2002 |
| Manufacturer's Serial Number | 1960 |
| Aircraft Type | Gyroplane |
| Category | Land |
| Builder Certification | Light Sport |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROTAX |
| Engine Model | 582SER |
| Engine Type | 2 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Type of Registrant | Individual |
| Owner Name | KNIGHT W MARK |
| Street | 15569 CLINGAN LN |
| City | WESTVILLE |
| State | IL |
| Zip Code | 61883-6132 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2007-09-08 |
| Certificate Issue Date | 2007-06-04 |
| Last Action Date | 2011-08-14 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2018-01-10 |
| Mode S Code | 53371725 |
| Mode S Code Hex | ADF3D5 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N9988K.
| Tail Number / N-Number | N9988K |
| Manufacturer | BELL |
| Model | 222 |
| Manufacturer's Serial Number | 47001 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 172 miles per hour |
| Mode S Code | 53371725 |
| Mode S Code Hex | ADF3D5 |