| Tail Number / N-Number | N690SG |
| Manufacturer | AERO COMMANDER |
| Model | 690A |
| Year Built | 1974 |
| Manufacturer's Serial Number | 11146 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 11 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AIRESEARCH |
| Engine Model | TPE331 SERIES |
| Engine Type | Turbo-prop |
| Number of Engines | 2 engines |
| Horsepower per Engine | 904 hp (674 kW) |
| Total Horsepower | 1,808 hp (1,349 kW) |
| Average Cruising Speed | 241 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | NEPTUNE AVIATION SERVICES INC |
| Street | 4301 CORPORATE WAY |
| City | MISSOULA |
| State | MT |
| Zip Code | 59808-7625 |
| Region | Northwest Mountain |
| County | Missoula County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1997-03-05 |
| Certificate Issue Date | 2022-10-29 |
| Last Action Date | 2022-10-29 |
| Expiration Date | 2029-10-31 |
| Status | Valid Registration |
| Mode S Code | 52226115 |
| Mode S Code Hex | A92C4D |