From the latest Q2 2016 Form 8-K Investor Update for AAG, dated July 22nd:

"As part of its restructuring process, Republic Airways has to date reduced the fleet capacity available to the Company by 18 E170 aircraft and 3 E175 aircraft. The Company is negotiating an amendment to its contractual relationship with Republic which as currently proposed contemplates further reduction of aircraft operated by Republic on behalf of the Company...The Company has taken various actions to mitigate the effects of this reduction in flying, including by adjusting its mainline schedule and seeking additional capacity from its wholly owned regional subsidiaries and other regional providers."