| Tail Number / N-Number | N21JJ |
| Manufacturer | LACH PETER J |
| Model | SKYBOLT |
| Manufacturer's Serial Number | JSL-100 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 2 seats |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | LYCOMING |
| Engine Model | O&VO-360 SER |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 180 hp (134 kW) |
| Type of Registrant | Individual |
| Owner Name | BLOCK HOWARD M |
| Street | 70 GREYSTONE ROAD EXT |
| City | PLYMOUTH |
| State | CT |
| Zip Code | 06782-2900 |
| Region | New England |
| County | Litchfield County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2000-09-27 |
| Certificate Issue Date | 2019-09-30 |
| Last Action Date | 2022-10-19 |
| Expiration Date | 2029-09-30 |
| Status | Valid Registration |
| Mode S Code | 50333772 |
| Mode S Code Hex | A1B7FA |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N21JJ.
| Tail Number / N-Number | N21JJ |
| Manufacturer | CESSNA |
| Model | 421A |
| Manufacturer's Serial Number | 421A0154 |
| 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 |
| Average Cruising Speed | 172 miles per hour |
| Type of Registrant | Individual |
| Owner Name | STEVENSON ARTHUR L |
| Street | 1601 SW 22ND AVE |
| City | FT LAUDERDALE |
| State | FL |
| Zip Code | 33312 |
| County | Litchfield County |
| Country | US |
| Certificate Issue Date | 1991-12-05 |
| Last Action Date | 1994-12-21 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1995-03-08 |