| Tail Number / N-Number | N4015S |
| 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 N4015S.
| Tail Number / N-Number | N4015S |
| Manufacturer | AYRES CORPORATION |
| Model | S2R-T34 |
| Year Built | 1979 |
| Manufacturer's Serial Number | 6042 |
| 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 CANADA |
| Engine Model | PT6A-60A |
| Engine Type | Turbo-prop |
| Number of Engines | 1 engine |
| Horsepower | 1,050 hp (783 kW) |
| Type of Registrant | Corporation |
| Owner Name | WHEELER RIDGE AVIATION INC |
| Street | 3704 PANORAMA DRIVE |
| City | BAKERSFIELD |
| State | CA |
| Zip Code | 93386 |
| Country | US |
| Airworthiness Classification | Restricted |
| Airworthiness Date | 1979-09-07 |
| Certificate Issue Date | 1987-03-05 |
| Last Action Date | 1998-10-02 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2013-06-06 |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4015S.
| Tail Number / N-Number | N4015S |
| Manufacturer | SIKORSKY |
| Model | S-61A |
| Year Built | 1971 |
| Manufacturer's Serial Number | 61483 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 28 seats |
| Weight Class | CLASS 2 (12,500 - 19,999 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Average Cruising Speed | 129 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | SIKORSKY AIRCRAFT DIVISION UNITED AIRCRAFT CORP |
| Street | MAIN ST |
| City | STRATFORD |
| State | CT |
| Zip Code | 06497 |
| Region | New England |
| Certificate Issue Date | 1971-09-25 |
| Last Status | Valid Registration |
| Cancellation Date | 1971-11-03 |
| Exported To | MALAYSIA |