| Tail Number / N-Number | N99KR |
| Manufacturer | MAZZEI ROBERT M |
| Model | RV4 |
| Manufacturer's Serial Number | 2679 |
| 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) |
| Number of Engines | 1 engine |
| Kit Manufacturer | VANS AIRCRAFT INC |
| Kit Model | RV-4 |
| Type of Registrant | Individual |
| Owner Name | MAZZEI ROBERT M |
| Street | 5311 VIEW POINT DR NW |
| City | GIG HARBOR |
| State | WA |
| Zip Code | 98335-7618 |
| Region | Northwest Mountain |
| County | Pierce County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2018-06-27 |
| Last Action Date | 2021-02-11 |
| Expiration Date | 2028-06-30 |
| Status | Valid Registration |
| Mode S Code | 53350473 |
| Mode S Code Hex | ADD13B |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N99KR.
| Tail Number / N-Number | N99KR |
| Manufacturer | HAWKER SIDDELEY |
| Model | DH.125-3A/R |
| Manufacturer's Serial Number | 25149 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 10 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 320 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | NORTHROP UNIVERSITY |
| Street | 8911 AVIATION BLVD |
| City | INGLEWOOD |
| State | CA |
| Zip Code | 90306 |
| County | Pierce County |
| Country | US |
| Certificate Issue Date | 1981-02-05 |
| Last Action Date | 1991-01-31 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1991-04-15 |