| Tail Number / N-Number | N3684H |
| Manufacturer | BEECH |
| Model | E-55 |
| Year Built | 1981 |
| Manufacturer's Serial Number | TE-1180 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| 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 | 2 engines |
| Horsepower per Engine | 285 hp (213 kW) |
| Total Horsepower | 570 hp (425 kW) |
| Average Cruising Speed | 165 miles per hour |
| Type of Registrant | LLC |
| Owner Name | NORTHWEST WIND LLC |
| Street | 8 OLD WESTBURY LN |
| City | WEBSTER GROVES |
| State | MO |
| Zip Code | 63119-4906 |
| Region | Central |
| County | St. Louis County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-06-12 |
| Certificate Issue Date | 2007-05-09 |
| Last Action Date | 2022-11-16 |
| Expiration Date | 2030-04-30 |
| Status | Valid Registration |
| Mode S Code | 51026360 |
| Mode S Code Hex | A42CF0 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N3684H.
| Tail Number / N-Number | N3684H |
| Manufacturer | ERCO |
| Model | 415-C |
| Manufacturer's Serial Number | 4309 |
| 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 | 88 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | CENTRAL FLYING SERVICE |
| Street | BOX 2060 |
| City | LITTLE ROCK |
| State | AR |
| Zip Code | 72331 |
| Region | Southwestern |
| County | St. Louis County |
| Last Status | Valid Registration |
| Cancellation Date | 1971-01-15 |