| Tail Number / N-Number | N4031S |
| Manufacturer | ADAMS BALLOON |
| Model | A55 |
| Manufacturer's Serial Number | 159 |
| Aircraft Type | Balloon |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 0 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Type of Registrant | Corporation |
| Owner Name | VERTICAL CONCEPTS INC |
| Street | 2711 CENTERVILLE RD STE 400 |
| City | WILMINGTON |
| State | DE |
| Zip Code | 19808-1645 |
| Region | Eastern |
| County | New Castle County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1985-08-30 |
| Certificate Issue Date | 2022-12-09 |
| Last Action Date | 2022-12-09 |
| Expiration Date | 2029-12-31 |
| Status | Valid Registration |
| Mode S Code | 51135122 |
| Mode S Code Hex | A4BA52 |
Deregistered Aircraft 1 of 2. This aircraft was previously assigned the N-number N4031S.
| Tail Number / N-Number | N4031S |
| Manufacturer | SIKORSKY |
| Model | S-61D |
| Year Built | 1973 |
| Manufacturer's Serial Number | 61706 |
| 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 |
| Street | UNITED AIRCRAFT CORP MAIN ST |
| City | STRATFORD |
| State | CT |
| Zip Code | 06602 |
| Region | New England |
| County | New Castle County |
| Certificate Issue Date | 1973-09-20 |
| Last Status | Valid Registration |
| Cancellation Date | 1973-11-23 |
| Exported To | BRAZIL |
Deregistered Aircraft 2 of 2. This aircraft was previously assigned the N-number N4031S.
| Tail Number / N-Number | N4031S |
| Manufacturer | HILLER |
| Model | UH-12E |
| Year Built | 1981 |
| Manufacturer's Serial Number | 5171 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 72 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | HILLER AVIATION |
| Street | 2075 W SCRANTON AVE |
| City | PORTERVILLE |
| State | CA |
| Zip Code | 93257 |
| Region | Western-Pacific |
| County | New Castle County |
| Last Status | Valid Registration |
| Cancellation Date | 1981-06-29 |
| Exported To | ARGENTINA |