| Tail Number / N-Number | N3991S |
| Manufacturer | CESSNA |
| Model | 172E |
| Year Built | 1964 |
| Manufacturer's Serial Number | 17251191 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 4 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | CONT MOTOR |
| Engine Model | 0-300 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 145 hp (108 kW) |
| Average Cruising Speed | 105 miles per hour |
| Type of Registrant | Corporation |
| Owner Name | ACKERMANN TRUCK SERVICE INC DBA |
| Other Names |
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| Street | 2337 TELEGRAPH RD |
| City | SAINT LOUIS |
| State | MO |
| Zip Code | 63125-3219 |
| Region | Central |
| County | St. Louis County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1964-01-21 |
| Certificate Issue Date | 1998-09-17 |
| Last Action Date | 2020-11-28 |
| Expiration Date | 2028-04-30 |
| Status | Valid Registration |
| Mode S Code | 51123304 |
| Mode S Code Hex | A4A6C4 |