| Tail Number / N-Number | N9121K |
| Manufacturer | AEROSTAR INTERNATIONAL INC |
| Model | RX-7 |
| Year Built | 1998 |
| Manufacturer's Serial Number | RX7-3325 |
| Aircraft Type | Balloon |
| 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 | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Type of Registrant | Individual |
| Owner Name | JOHNSON ROBB C |
| Street | 15277 BLOOMFIELD LANE |
| City | COUNCIL BLUFFS |
| State | IA |
| Zip Code | 51503 |
| Region | Central |
| County | Pottawattamie County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1998-03-17 |
| Certificate Issue Date | 2016-02-29 |
| Last Action Date | 2021-11-12 |
| Expiration Date | 2029-02-28 |
| Status | Valid Registration |
| Mode S Code | 53120236 |
| Mode S Code Hex | ACA09E |
Deregistered Aircraft 1 of 3. This aircraft was previously assigned the N-number N9121K.
| Tail Number / N-Number | N9121K |
| Manufacturer | PIPER |
| Model | PA-34-220T |
| Manufacturer's Serial Number | 3433038 |
| Aircraft Type | Fixed wing multi engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 7 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 2 engines |
| Type of Registrant | Corporation |
| Owner Name | GLOBE AERO LIMITED INC |
| Street | P O BOX 5775 |
| City | LAKELAND |
| State | FL |
| Zip Code | 33803 |
| Region | Southern |
| County | Pottawattamie County |
| Certificate Issue Date | 1987-05-06 |
| Last Status | Valid Registration |
| Cancellation Date | 1987-05-06 |
| Exported To | GERMANY |
Deregistered Aircraft 2 of 3. This aircraft was previously assigned the N-number N9121K.
| Tail Number / N-Number | N9121K |
| Manufacturer | STINSON |
| Model | 108-1 |
| Manufacturer's Serial Number | 1082121 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 84 miles per hour |
| Type of Registrant | Individual |
| Owner Name | BENNETT LAYTON A |
| County | Pottawattamie County |
| Certificate Issue Date | 1965-11-19 |
| Last Status | Valid Registration |
| Cancellation Date | 1970-06-26 |
Deregistered Aircraft 3 of 3. This aircraft was previously assigned the N-number N9121K.
| Tail Number / N-Number | N9121K |
| Manufacturer | CESSNA |
| Model | U206G |
| Manufacturer's Serial Number | U20606573 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 6 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 132 miles per hour |
| County | Pottawattamie County |
| Last Status | N-Number Assigned – but has not yet been registered |
| Cancellation Date | 1988-09-23 |