| Tail Number / N-Number | N155UM |
| Manufacturer | EUROCOPTER |
| Model | EC 155 B1 |
| Year Built | 2011 |
| Manufacturer's Serial Number | 6934 |
| 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 2C2 |
| Engine Type | Turbo-shaft |
| Number of Engines | 2 engines |
| Horsepower per Engine | 821 hp (612 kW) |
| Total Horsepower | 1,642 hp (1,225 kW) |
| Type of Registrant | Government |
| Owner Name | REGENTS OF THE UNIVERSITY OF MICHIGAN |
| Street | C/O METRO AVIATION INC 747 AIRPORT DR |
| City | ANN ARBOR |
| State | MI |
| Zip Code | 48108 |
| Region | Great Lakes |
| County | Washtenaw County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2012-04-12 |
| Certificate Issue Date | 2018-12-28 |
| Last Action Date | 2022-02-12 |
| Expiration Date | 2028-12-31 |
| Status | Valid Registration |
| Mode S Code | 50157220 |
| Mode S Code Hex | A0DE90 |