| Tail Number / N-Number | N421GB |
| Manufacturer | ALEXANDER SCHLEICHER GMBH & CO |
| Model | ASK 21 |
| Year Built | 2016 |
| Manufacturer's Serial Number | 21937 |
| Aircraft Type | Glider |
| 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 | NONE |
| Engine Model | NONE |
| Number of Engines | 0 engines |
| Type of Registrant | Corporation |
| Owner Name | GREATER BOSTON SOARING CLUB INC |
| Street | PO BOX 655 |
| City | STERLING |
| State | MA |
| Zip Code | 01564-0655 |
| Region | New England |
| County | Worcester County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 2016-09-14 |
| Certificate Issue Date | 2016-08-12 |
| Last Action Date | 2022-04-03 |
| Expiration Date | 2029-08-31 |
| Status | Valid Registration |
| Mode S Code | 51177756 |
| Mode S Code Hex | A4FFEE |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N421GB.
| Tail Number / N-Number | N421GB |
| Manufacturer | CESSNA |
| Model | 421A |
| Year Built | 1997 |
| Manufacturer's Serial Number | 421A0116 |
| 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) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 2 engines |
| Average Cruising Speed | 172 miles per hour |
| Type of Registrant | Individual |
| Owner Name | EVANS DICK G |
| Street | PO BOX 1270 |
| City | PERRIS |
| State | CA |
| Zip Code | 92572-1270 |
| County | Worcester County |
| Country | US |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1997-08-15 |
| Certificate Issue Date | 2000-06-26 |
| Last Action Date | 2003-06-17 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 2003-08-11 |