| Tail Number / N-Number | N12AD |
| Manufacturer | ALTIZER JOHN W |
| Model | ALTIZER RV-4 |
| Year Built | 1994 |
| Manufacturer's Serial Number | JWA-2 |
| 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 | ALTIZER JOHN N |
| Street | 21 E WANDERING OAK DR |
| City | THE WOODLANDS |
| State | TX |
| Zip Code | 77381-3428 |
| Region | Southwestern |
| County | Montgomery County |
| Country | US |
| Fractional Ownership | No |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 1995-07-12 |
| Certificate Issue Date | 2017-08-09 |
| Last Action Date | 2020-03-12 |
| Expiration Date | 2027-08-31 |
| Status | Valid Registration |
| Mode S Code | 50050535 |
| Mode S Code Hex | A0515D |
Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N12AD.
| Tail Number / N-Number | N12AD |
| Manufacturer | ALTIZER |
| Model | PL-1 |
| Manufacturer's Serial Number | JWA1 |
| 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) |
| Number of Engines | 1 engine |
| Average Cruising Speed | 85 miles per hour |
| Type of Registrant | Individual |
| Owner Name | ALTIZER JOHN W |
| Street | 5964 BROKEN ARROW ST |
| City | SIMI VALLEY |
| State | CA |
| Zip Code | 93063 |
| County | Montgomery County |
| Country | US |
| Certificate Issue Date | 1975-09-05 |
| Last Action Date | 1993-02-26 |
| Last Status | The Triennial Aircraft Registration form was mailed and has not been returned by the Post Office |
| Cancellation Date | 1994-03-16 |