| Tail Number / N-Number | N2UM |
| Manufacturer | CESSNA |
| Model | 310B |
| Year Built | 1958 |
| Manufacturer's Serial Number | 35649 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 5 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | O-470 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 2 engines |
| Horsepower per Engine | 230 hp (172 kW) |
| Total Horsepower | 460 hp (343 kW) |
| Average Cruising Speed | 167 miles per hour |
| Type of Registrant | Co-Ownership |
| Owner Name | HEPFER JOHN EDWARD |
| Other Names |
|
| Street | PO BOX 61327 |
| City | MIDLAND |
| State | TX |
| Zip Code | 79711-1327 |
| Region | Southwestern |
| County | Midland County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1958-02-01 |
| Certificate Issue Date | 2020-08-05 |
| Last Action Date | 2020-08-05 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 50307437 |
| Mode S Code Hex | A18F1F |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N2UM.
| Tail Number / N-Number | N2UM |
| Manufacturer | UHLEY-MASON |
| Model | R.A.F. VARI-EZE |
| Manufacturer's Serial Number | 705 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Type of Registrant | Partnership |
| Owner Name | MASON PAUL A |
| Other Names |
|
| Street | 25 MIDDLE ROAD |
| City | PALM BEACH |
| State | FL |
| Zip Code | 33480 |
| County | Midland County |
| Country | US |
| Certificate Issue Date | 1986-06-27 |
| Last Action Date | 1989-05-31 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1991-10-25 |