| Tail Number / N-Number | N99MX |
| Manufacturer | ROBINSON HELICOPTER CO |
| Model | R66 |
| Year Built | 2013 |
| Manufacturer's Serial Number | 0443 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | ROLLS-ROYC |
| Engine Model | 250-C300/A1 |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Corporation |
| Owner Name | WW-HELICOPTER INC TRUSTEE |
| Street | 1013 CENTRE RD STE 403-A |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19805-1270 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2021-05-24 |
| Certificate Issue Date | 2023-01-29 |
| Last Action Date | 2023-01-29 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 53350563 |
| Mode S Code Hex | ADD173 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N99MX.
| Tail Number / N-Number | N99MX |
| Manufacturer | MAULE |
| Model | MX-7-180 |
| Manufacturer's Serial Number | 11096C |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Corporation |
| Owner Name | USA MARINE INC |
| Street | 1209 ORANGE STREET |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19801 |
| County | New Castle County |
| Country | US |
| Certificate Issue Date | 1993-12-27 |
| Last Action Date | 1998-12-16 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2001-04-12 |
| Exported To | UNITED KINGDOM |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N99MX.
| Tail Number / N-Number | N99MX |
| Manufacturer | DUNKERSON FRANK L |
| Model | FDEMXQ |
| Manufacturer's Serial Number | 1FDEMXQ2 |
| 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 |
| County | New Castle County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1990-05-08 |