| Tail Number / N-Number | N309MD |
| Manufacturer | AVIONS HOLSTE MAX |
| Model | 1521 C1 |
| Year Built | 1961 |
| Manufacturer's Serial Number | 309 |
| 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 | P&W |
| Engine Model | R-985 SERIES |
| Engine Type | Reciprocating |
| Number of Engines | 1 engine |
| Horsepower | 450 hp (336 kW) |
| Type of Registrant | Partnership |
| Owner Name | MARTIN JEFF S |
| Other Names |
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| Street | 1316 J ST |
| City | WASCO |
| State | CA |
| Zip Code | 93280-2367 |
| Region | Western-Pacific |
| County | Kern County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1998-05-04 |
| Certificate Issue Date | 2012-11-01 |
| Last Action Date | 2021-06-15 |
| Expiration Date | 2028-11-30 |
| Status | Valid Registration |
| Mode S Code | 50640730 |
| Mode S Code Hex | A341D8 |