| Tail Number / N-Number | N4921R |
| Manufacturer | CESSNA |
| Model | A188B |
| Year Built | 1975 |
| Manufacturer's Serial Number | 18802438T |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO 520 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 285 hp (213 kW) |
| Average Cruising Speed | 108 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | WESTERLINE HARRINGTON FLYING SERVICE INC |
| Street | PO BOX 350 |
| City | HOLDREGE |
| State | NE |
| Zip Code | 68949-0350 |
| Region | Central |
| County | Phelps County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1975-11-15 |
| Certificate Issue Date | 2021-05-12 |
| Last Action Date | 2021-05-12 |
| Expiration Date | 2028-05-31 |
| Status | Valid Registration |
| Mode S Code | 51415021 |
| Mode S Code Hex | A61A11 |