Complex sentence: Several of these modifications were a first for Learjet, including an all new inboard wing cuff added to the inboard sections of the "Longhorn" wing and an all new wing-to-body fairing.
Split into simpler sentences: Several of these modifications were a first for Learjet. They include an all new inboard wing cuff added to the inboard sections of the "Longhorn" wing and an all new wing-to-body fairing.