| Tail Number / N-Number | N9990 |
| Manufacturer | BERKSHIRE MFG. CORP. |
| Model | CONCEPT 70 |
| Year Built | 1974 |
| Manufacturer's Serial Number | 16 |
| Aircraft Type | Glider |
| Category | Land |
| Builder Certification | Not 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 |
| Average Cruising Speed | 45 miles per hour |
| Type of Registrant | Individual |
| Owner Name | LEONARD STEVEN E |
| Street | 11117 W WESTLAWN ST |
| City | WICHITA |
| State | KS |
| Zip Code | 67212-6411 |
| Region | Central |
| County | Sedgwick County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1979-05-24 |
| Certificate Issue Date | 2020-08-15 |
| Last Action Date | 2020-08-15 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 53373152 |
| Mode S Code Hex | ADF66A |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N9990.
| Tail Number / N-Number | N9990 |
| Manufacturer | TRAVEL AIR |
| Model | 4-D |
| Manufacturer's Serial Number | 1166 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Type Certificated |
| Number of Seats | 3 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 79 miles per hour |
| Type of Registrant | Individual |
| Owner Name | MURDOCK M MARCELLUS |
| Street | 140 NORTH BELMONT ST |
| City | WICHITA |
| State | KS |
| Zip Code | 67201 |
| Region | Central |
| County | Sedgwick County |
| Certificate Issue Date | 1930-03-29 |
| Last Status | Valid Registration |
| Cancellation Date | 1935-07-07 |