This document is a supplement to DO-282B. It contains corrections to typographical errors, corrections to test procedures and notes added to clarify existing text. These changes represent feedback from industry use of the published version of DO-282B. This supplement does not alter any existing requirements and does not affect the compliance of any equipment designed to meet the original published document. (Note: Those that have previously purchased DO-282B, issued December 2, 2009 need only this Corrigendum to have complete information.)