| Tail Number / N-Number | N40MK |
| Manufacturer | MICHAEL E KELLY |
| Model | LANCAIR 4P |
| Manufacturer's Serial Number | LIV-P 483 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not 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 |
| Kit Manufacturer | LANCAIR INTERNATIONAL LLC |
| Kit Model | IV-P |
| Type of Registrant | Individual |
| Owner Name | KELLY MICHAEL E |
| Street | 59 RAWSON RD |
| City | CUMBERLAND |
| State | RI |
| Zip Code | 02864-4271 |
| Region | New England |
| County | Providence County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2019-10-30 |
| Last Action Date | 2022-05-12 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 51125545 |
| Mode S Code Hex | A4AB65 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N40MK.
| Tail Number / N-Number | N40MK |
| Manufacturer | KNIGHT EUGENE S |
| Model | KR-2S |
| Year Built | 2000 |
| Manufacturer's Serial Number | 954 |
| 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 | REVMASTER |
| Engine Model | 2100 |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Type of Registrant | Individual |
| Owner Name | KNIGHT EUGENE S |
| Street | 14414 COUNTY ROAD 32 |
| City | SUMMERDALE |
| State | AL |
| Zip Code | 36580-4046 |
| County | Providence County |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2000-06-22 |
| Certificate Issue Date | 1999-06-18 |
| Last Action Date | 2008-12-04 |
| Last Status | A second attempt has been made at mailing a Triennial Aircraft Registration form to the owner with no response |
| Cancellation Date | 2009-01-13 |
| Exported To | AUSTRALIA |