Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N550YS.
| Tail Number / N-Number | N550YS |
| Manufacturer | SCHOEPFLIN DALE E |
| Model | DA-4-550 |
| Year Built | 1997 |
| Manufacturer's Serial Number | 97-001 |
| Aircraft Type | Fixed wing single engine |
| Category | Amphibian |
| Builder Certification | Not Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-550 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 300 hp (224 kW) |
| Type of Registrant | Individual |
| Owner Name | HUMBLE WILLIAM R |
| Street | 819 COURTNEY ST |
| City | MOSCOW |
| State | ID |
| Zip Code | 83843-9601 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1999-04-22 |
| Certificate Issue Date | 2006-09-29 |
| Last Action Date | 2009-10-20 |
| Last Status | Third Notice for Re-Registration/Renewal |
| Cancellation Date | 2013-01-07 |
| Mode S Code | 51600642 |
| Mode S Code Hex | A701A2 |