Deregistered Aircraft 1 of 1. This aircraft was previously assigned the N-number N91599.
| Tail Number / N-Number | N91599 |
| Manufacturer | MACNUTT WILLIAM PHILLIP |
| Model | WPM4 |
| Year Built | 2001 |
| Manufacturer's Serial Number | 001 |
| Aircraft Type | Balloon |
| Category | Land |
| Builder Certification | Not Type Certificated |
| Number of Seats | 1 seat |
| Weight Class | CLASS 1 (Up to 12,499 pounds gross take off weight) |
| Engine Manufacturer | AMA/EXPR |
| Engine Model | UNKNOWN ENG |
| Number of Engines | 0 engines |
| Type of Registrant | Individual |
| Owner Name | MACNUTT WILLIAM PHILLIP |
| Street | 810 COLUMBUS ST |
| City | AUSTIN |
| State | TX |
| Zip Code | 78704-2361 |
| Country | US |
| Airworthiness Classification | Experimental |
| Airworthiness Date | 2001-06-26 |
| Certificate Issue Date | 2001-03-02 |
| Last Action Date | 2011-04-01 |
| Last Status | Registration Expired - Pending Cancellation |
| Cancellation Date | 2017-10-20 |
| Mode S Code | 53126363 |
| Mode S Code Hex | ACACF3 |