| Tail Number / N-Number | N51840 |
| Manufacturer | CESSNA |
| Model | 172P |
| Year Built | 1980 |
| Manufacturer's Serial Number | 17274359 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | 0-320 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | LLC |
| Owner Name | AIR TREK NORTH LLC |
| Street | 1620 HENRY AVE |
| City | SOUTH SAINT PAUL |
| State | MN |
| Zip Code | 55075-3558 |
| Region | Great Lakes |
| County | Dakota County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1980-11-03 |
| Certificate Issue Date | 2020-10-22 |
| Last Action Date | 2022-05-05 |
| Expiration Date | 2027-10-31 |
| Status | Valid Registration |
| Mode S Code | 51501044 |
| Mode S Code Hex | A68224 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N51840.
| Tail Number / N-Number | N51840 |
| Manufacturer | FAIRCHILD |
| Model | PT-19A |
| Year Built | 1945 |
| Manufacturer's Serial Number | T43-5068 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 |
| Average Cruising Speed | 97 miles per hour |
| Type of Registrant | Individual |
| Owner Name | FRANK GUSTAV |
| Street | 141 WILBRAHAM RD |
| City | SPRINGFIELD |
| State | MA |
| Zip Code | 01109 |
| Region | New England |
| County | Dakota County |
| Certificate Issue Date | 1946-04-29 |
| Last Status | Valid Registration |
| Cancellation Date | 1948-11-29 |