Quad Duplex
No failure report names the quad duplex. 2 FAA approvals let 1 company make a replacement quad duplex, Aeroantenna Technology, INC. holding the most (2).
Approved replacement parts 2 parts manufacturer approvals
A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a quad duplex and sell it as an approved part for the models named. These are the companies holding such approvals for a quad duplex:
For these models most: Cessna 560 Citation V, Ultra, Encore and Excel (2).
| Maker | Part | Replaces | Fits | Granted | Status |
|---|---|---|---|---|---|
| Aeroantenna Technology, INC. | Quad Duplex Antenna AT2450-2 | AT2450-2 | Textron Aviation 560XL | 2021-03-23 | current |
| Aeroantenna Technology, INC. | Quad Duplex Antenna AT2450-2 | Modification Part | Textron Aviation Inc. 560XL, 560XLS | 2018-03-20 | current |
Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.