| Tail Number / N-Number | N421HB |
| Manufacturer | DIAMOND AIRCRAFT IND INC |
| Model | DA20-C1 |
| Year Built | 2005 |
| Manufacturer's Serial Number | C0336 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-240-B |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 125 hp (93 kW) |
| Type of Registrant | LLC |
| Owner Name | NICHOLS AVIATION LLC |
| Street | 1031 NE 102ND ST |
| City | SEATTLE |
| State | WA |
| Zip Code | 98125-7519 |
| Region | Northwest Mountain |
| County | King County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2005-08-10 |
| Certificate Issue Date | 2007-02-07 |
| Last Action Date | 2022-06-19 |
| Expiration Date | 2029-07-31 |
| Status | Valid Registration |
| Mode S Code | 51200007 |
| Mode S Code Hex | A50007 |