| Tail Number / N-Number | N990ST |
| Manufacturer | BOEING |
| Model | 737-4YO |
| Year Built | 1989 |
| Manufacturer's Serial Number | 24493 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 149 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Engine Manufacturer | CFM INTL |
| Engine Model | CFM56-3C |
| Engine Type | Turbo-fan |
| Number of Engines | 2 engines |
| Thrust per Engine | 23,515 pounds-force (104.6 kN) |
| Total Thrust | 47,030 pounds-force (209.2 kN) |
| Type of Registrant | Government |
| Owner Name | NATIONAL NUCLEAR SECURITY ADMINISTRATION |
| Street | PO BOX 5400 |
| City | ALBUQUERQUE |
| State | NM |
| Zip Code | 87185-5400 |
| Region | Southwestern |
| County | Bernalillo County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2014-11-12 |
| Certificate Issue Date | 2020-06-09 |
| Last Action Date | 2023-01-22 |
| Expiration Date | 2027-06-30 |
| Status | Valid Registration |
| Mode S Code | 53352105 |
| Mode S Code Hex | ADD445 |