| Tail Number / N-Number | N312SD |
| Manufacturer | EUROCOPTER |
| Model | AS 350 B3 |
| Year Built | 2006 |
| Manufacturer's Serial Number | 4101 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | TURBOMECA |
| Engine Model | ARRIEL 2B1 |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 747 hp (557 kW) |
| Type of Registrant | Government |
| Owner Name | HARRIS COUNTY SHERIFFS OFFICE |
| Street | 1200 BAKER ST |
| City | HOUSTON |
| State | TX |
| Zip Code | 77002-1206 |
| Region | Southwestern |
| County | Harris County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-02-23 |
| Certificate Issue Date | 2019-08-20 |
| Last Action Date | 2022-04-19 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 50647723 |
| Mode S Code Hex | A34FD3 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N312SD.
| Tail Number / N-Number | N312SD |
| Manufacturer | BELL |
| Model | UH-1H |
| Manufacturer's Serial Number | 66-01052 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 15 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 | US DEPARTMENT OF STATE INL/A |
| Street | HANGAR 985 1038 S PATRICK DR |
| City | PATRICK AFB |
| State | FL |
| Zip Code | 32925 |
| County | Harris County |
| Country | US |
| Certificate Issue Date | 2008-02-07 |
| Last Action Date | 2008-02-07 |
| Last Status | Valid Registration |
| Cancellation Date | 2011-11-21 |
| Exported To | COLOMBIA |