| Tail Number / N-Number | N4011S |
| Type of Reservation | Reserved to manufacturer - no fee, no expiration date |
| Reserving Party Name | MD HELICOPTERS INC |
| Street | 4555 E MCDOWELL RD |
| City | MESA |
| State | AZ |
| Zip Code | 85215-9734 |
| Date Reserved | 2019-02-22 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4011S.
| Tail Number / N-Number | N4011S |
| Manufacturer | AYRES CORPORATION |
| Model | S2R-600 |
| Year Built | 1979 |
| Manufacturer's Serial Number | 2541R |
| 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 | P&W |
| Engine Model | R1340 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 600 hp (448 kW) |
| Type of Registrant | Corporation |
| Owner Name | AIRCRAFT RENTALS INC |
| Street | PO BOX 5955 |
| City | GREENVILLE |
| State | MS |
| Zip Code | 38704 |
| Country | US |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1979-05-02 |
| Certificate Issue Date | 1986-08-27 |
| Last Action Date | 2010-06-15 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2012-11-15 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4011S.
| Tail Number / N-Number | N4011S |
| Manufacturer | SIKORSKY |
| Model | S-65C3 |
| Year Built | 1975 |
| Manufacturer's Serial Number | 65397 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 41 seats |
| Weight Class | CLASS 3 (20,000+ pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | UNITED AIRCRAFT CORP SIKORSKY AIRCRAFT DIVISION |
| Street | MAIN ST |
| City | STRATFORD CT |
| State | CT |
| Zip Code | 06602 |
| Region | New England |
| Certificate Issue Date | 1975-04-19 |
| Last Status | Valid Registration |
| Cancellation Date | 1975-05-14 |
| Exported To | ISRAEL |