| Tail Number / N-Number | N73MM |
| Manufacturer | MATTHEWS W P/MULLINS J W |
| Model | HARMON ROCKET II |
| Year Built | 2003 |
| Manufacturer's Serial Number | 51 |
| 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 | LYCOMING |
| Engine Model | IO-540 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Kit Manufacturer | HARMON ROCKET LLC |
| Kit Model | RR II |
| Type of Registrant | LLC |
| Owner Name | WIL-CO FLYING SERVICE LLC |
| Street | PO BOX 272 |
| City | DEWITT |
| State | AR |
| Zip Code | 72042-0272 |
| Region | Southwestern |
| County | Arkansas County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2003-03-29 |
| Certificate Issue Date | 2020-12-16 |
| Last Action Date | 2020-12-16 |
| Expiration Date | 2027-12-31 |
| Status | Valid Registration |
| Mode S Code | 52344721 |
| Mode S Code Hex | A9C9D1 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N73MM.
| Tail Number / N-Number | N73MM |
| Manufacturer | BELL HELICOPTER TEXTRON |
| Model | 206L-1 |
| Manufacturer's Serial Number | 45180 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 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 | SOUTHWEST HELICOPTERS INC |
| Street | 6666 S PLUMER |
| City | TUCSON |
| State | AZ |
| Zip Code | 85706 |
| County | Arkansas County |
| Country | US |
| Certificate Issue Date | 1994-10-21 |
| Last Action Date | 1994-10-24 |
| Last Status | Valid Registration |
| Cancellation Date | 1996-02-02 |
| Exported To | CANADA |