| Tail Number / N-Number | N91TH |
| Manufacturer | AVIAT INC |
| Model | PITTS S-1T |
| Manufacturer's Serial Number | 1059 |
| 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 | LYCOMING |
| Engine Model | AEIO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Corporation |
| Owner Name | EMPYREAN AIR CORP |
| Street | 1724 W 33RD AVE |
| City | DENVER |
| State | CO |
| Zip Code | 80211-3509 |
| Region | Northwest Mountain |
| County | Denver County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2012-06-05 |
| Certificate Issue Date | 2021-09-14 |
| Last Action Date | 2021-09-14 |
| Expiration Date | 2028-09-30 |
| Status | Valid Registration |
| Mode S Code | 53113003 |
| Mode S Code Hex | AC9603 |