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Operators of Rockwell Collins Pro Line 21-equipped Hawker Beechcraft King Air 200/300-series turboprop twins are now eligible for upgrades to include Wide Area Augmentation System (WAAS) capability. Hawker Beechcraft is currently working on a similar upgrade for Premier 1A and Hawker 400XP/Beechjet400A-series jets.
![Mark Phelps](https://www.flyingmag.com/uploads/2023/08/22-4-Phelps-image-96x96.jpg.webp?auto=webp)
Mark PhelpsAuthor
Mark Phelps is a senior editor at AVweb. He is an instrument rated private pilot and former owner of a Grumman American AA1B and a V-tail Bonanza.
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