| Tail Number / N-Number | N1421R |
| Manufacturer | GRUMMAN AMERICAN AVN. CORP. |
| Model | AA-1B |
| Year Built | 1975 |
| Manufacturer's Serial Number | AA1B-0521 |
| Aircraft Type | Fixed wing single engine |
| Category | Land |
| Builder Certification | 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 | 0-235 SERIES |
| Engine Type | 4 Cycle |
| Number of Engines | 1 engine |
| Horsepower | 115 hp (86 kW) |
| Average Cruising Speed | 100 miles per hour |
| Type of Registrant | Co-Ownership |
| Owner Name | GREENAWALD RICHARD J |
| Other Names |
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| Street | 9 BAY LNDG |
| City | SAN MATEO |
| State | CA |
| Zip Code | 94401-2000 |
| Region | Western-Pacific |
| County | San Mateo County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Standard |
| Airworthiness Date | 1975-08-12 |
| Certificate Issue Date | 2014-01-14 |
| Last Action Date | 2022-11-03 |
| Expiration Date | 2030-01-31 |
| Status | Valid Registration |
| Mode S Code | 50126251 |
| Mode S Code Hex | A0ACA9 |