| Tail Number / N-Number | N190UM |
| Type of Reservation | 2 year hold for canceled N-numbers |
| Reserving Party Name | CANCELLED/NOT ASSIGNED |
| Date Reserved | 2018-10-23 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N190UM.
| Tail Number / N-Number | N190UM |
| Manufacturer | UNIVERSITY OF MARYLAND UAS TES |
| Model | IRIS |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 0 seats |
| Weight Class | CLASS 4 (UAV up to 55 pounds gross take off weight) |
| Number of Engines | 4 engines |
| Type of Registrant | Government |
| Owner Name | UNIVERSITY OF MD UAS TEST SITE |
| Street | 44200 AIRPORT RD STE A |
| City | CALIFORNIA |
| State | MD |
| Zip Code | 20619-6146 |
| Country | US |
| Certificate Issue Date | 2015-05-22 |
| Last Action Date | 2015-05-22 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2018-10-23 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N190UM.
| Tail Number / N-Number | N190UM |
| Manufacturer | DOUGLAS |
| Model | DC3C-S1C3G |
| Manufacturer's Serial Number | 2119 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 32 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 150 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | AERO SERVICE CORP |
| Street | 1875 CONNECTICUT N W SUITE 1013 |
| City | WASHINGTON |
| State | DC |
| Zip Code | 20009 |
| Region | Eastern |
| Certificate Issue Date | 1967-10-03 |
| Last Status | Valid Registration |
| Cancellation Date | 1971-02-04 |
| Exported To | SOUTH AFRICA |