| Tail Number / N-Number | N998MK |
| Manufacturer | MARK KLAIR |
| Model | MOSQUITO XET |
| Year Built | 2012 |
| Manufacturer's Serial Number | MXE1112110B |
| Aircraft Type | Rotorcraft |
| 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 | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 1 engine |
| Kit Manufacturer | COMPOSITE FX |
| Kit Model | MOSQUITO XET |
| Type of Registrant | Individual |
| Owner Name | KLINE WILLIAM F E III |
| Street | 1911 RIDGE RD |
| City | SELLERSVILLE |
| State | PA |
| Zip Code | 18960-3053 |
| Region | Eastern |
| County | Bucks County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2012-01-31 |
| Certificate Issue Date | 2022-05-17 |
| Last Action Date | 2022-05-17 |
| Expiration Date | 2029-05-31 |
| Status | Valid Registration |
| Mode S Code | 53370570 |
| Mode S Code Hex | ADF178 |