| Tail Number / N-Number | N9660E |
| Manufacturer | AERONCA |
| Model | 11AC |
| Year Built | 1946 |
| Manufacturer's Serial Number | 11AC-1297 |
| 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 | A&C65 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 65 hp (48 kW) |
| Average Cruising Speed | 75 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | HOFFMAN FLYING SERVICE INC |
| Street | 9341 TWIN LAKES RD |
| City | CHEBOYGAN |
| State | MI |
| Zip Code | 49721-9548 |
| Region | Great Lakes |
| County | Cheboygan County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1961-07-19 |
| Certificate Issue Date | 1996-10-01 |
| Last Action Date | 2021-09-13 |
| Expiration Date | 2028-10-31 |
| Status | Valid Registration |
| Mode S Code | 53272315 |
| Mode S Code Hex | AD74CD |