| Tail Number / N-Number | N421SP |
| Manufacturer | MD HELICOPTERS INC |
| Model | 369FF |
| Year Built | 2008 |
| Manufacturer's Serial Number | 0714FF |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | 250-C20 |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 400 hp (298 kW) |
| Total Horsepower | 800 hp (597 kW) |
| Type of Registrant | Government |
| Owner Name | KENTUCKY STATE POLICE |
| Street | 919 VERSAILLES RD |
| City | FRANKFORT |
| State | KY |
| Zip Code | 40601-4740 |
| Region | Central |
| County | Franklin County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2016-01-08 |
| Certificate Issue Date | 2019-08-13 |
| Last Action Date | 2022-07-14 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 51200364 |
| Mode S Code Hex | A500F4 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N421SP.
| Tail Number / N-Number | N421SP |
| Manufacturer | CESSNA |
| Model | 210L |
| Year Built | 1975 |
| Manufacturer's Serial Number | 21060705 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 285 hp (213 kW) |
| Average Cruising Speed | 87 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | SIGNATURE AIRCRAFT INC |
| Street | 3511 SILVERSIDE RD STE 105 |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19810-4902 |
| County | Franklin County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1975-02-27 |
| Certificate Issue Date | 2014-01-02 |
| Last Action Date | 2014-02-04 |
| Last Status | Valid Registration |
| Cancellation Date | 2014-03-03 |
| Exported To | PARAGUAY |