| Tail Number / N-Number | N621MB |
| Manufacturer | ROBINSON HELICOPTER CO |
| Model | R66 |
| Year Built | 2015 |
| Manufacturer's Serial Number | 0579 |
| 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 | NTM FOUNDATION |
| Street | 3870 W VOLUNTEER ST |
| City | MC NEAL |
| State | AZ |
| Zip Code | 85617-9639 |
| Region | Western-Pacific |
| County | Cochise County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2015-01-07 |
| Certificate Issue Date | 2016-08-24 |
| Last Action Date | 2022-03-15 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 52015411 |
| Mode S Code Hex | A81B09 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N621MB.
| Tail Number / N-Number | N621MB |
| Manufacturer | MESSERSCHMITT-BOELKOW-BLOHM |
| Model | BO-105S |
| Manufacturer's Serial Number | S-747 |
| 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) |
| Number of Engines | 2 engines |
| County | Cochise County |
| Last Action Date | 1986-01-14 |
| Last Status | N-Number assigned as import but has not been registered that is pending cancellation |
| Cancellation Date | 2011-03-10 |