Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N591RB.
| Tail Number / N-Number | N591RB |
| Manufacturer | S N I A S |
| Model | AS-350B ECUREUIL |
| Year Built | 1981 |
| Manufacturer's Serial Number | 1389 |
| Aircraft Type | Rotorcraft |
| 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 | TURBOMECA |
| Engine Model | ARRIEL 1SER |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 681 hp (508 kW) |
| Type of Registrant | Partnership |
| Owner Name | MOUNTAIN LIFEFLIGHT LP |
| Street | 694-800 RIDGETOP RD |
| City | SUSANVILLE |
| State | CA |
| Zip Code | 96130 |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1981-05-08 |
| Certificate Issue Date | 2001-10-15 |
| Last Action Date | 2007-10-16 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-04-15 |
| Mode S Code | 51721227 |
| Mode S Code Hex | A7A297 |