| Tail Number / N-Number | N6640Z |
| Manufacturer | HUGHES |
| Model | OH-6A |
| Manufacturer's Serial Number | 66-16076 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Government |
| Owner Name | USDA APHIS WS ATOC |
| Street | AVIATION TRAINING & OPERATIONS C 1223 N AIRPORT RD |
| City | CEDAR CITY |
| State | UT |
| Zip Code | 84721-8412 |
| Region | Northwest Mountain |
| County | Iron County |
| Country | US |
| Fractional Ownership | No |
| Certificate Issue Date | 2011-06-14 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 52142605 |
| Mode S Code Hex | A8C585 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N6640Z.
| Tail Number / N-Number | N6640Z |
| Manufacturer | PIPER |
| Model | PA-25-235 |
| Manufacturer's Serial Number | 252235 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 93 miles per hour |
| County | Iron County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1990-01-29 |