| Tail Number / N-Number | N91AS |
| Manufacturer | DIAMOND AIRCRAFT IND INC |
| Model | DA20-C1 |
| Year Built | 2007 |
| Manufacturer's Serial Number | C0443 |
| 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) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | IO-240-B |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 125 hp (93 kW) |
| Type of Registrant | Corporation |
| Owner Name | SKYLINE AVIATION INC |
| Street | 8926 HANGAR RD |
| City | SAN ANGELO |
| State | TX |
| Zip Code | 76904-4071 |
| Region | Southwestern |
| County | Tom Green County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2007-07-25 |
| Certificate Issue Date | 2021-07-19 |
| Last Action Date | 2021-11-05 |
| Expiration Date | 2028-07-31 |
| Status | Valid Registration |
| Mode S Code | 53112143 |
| Mode S Code Hex | AC9463 |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N91AS.
| Tail Number / N-Number | N91AS |
| Manufacturer | SIKORSKY |
| Model | S55B |
| Year Built | 1954 |
| Manufacturer's Serial Number | 55646 |
| Aircraft Type | Rotorcraft |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 12 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AIRESEARCH |
| Engine Model | TSE331 SERIES |
| Engine Type | Turbo-shaft |
| Number of Engines | 1 engine |
| Horsepower | 800 hp (597 kW) |
| Average Cruising Speed | 78 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | WESTEC AIR INC |
| Street | 4949 E FALCON DR |
| City | MESA |
| State | AZ |
| Zip Code | 85205 |
| County | Tom Green County |
| Country | US |
| Airworthiness Classification | Standard |
| Certificate Issue Date | 1986-01-31 |
| Last Action Date | 2007-12-18 |
| Last Status | Registration Expired – Pending Cancellation |
| Cancellation Date | 2015-05-11 |