These provisions are tied to Republic's current fleet of Embraer jets, specifically its fleet of 50 ERJ145 aircraft. Furthermore, as fellow Fool (and airline expert) Adam Levine-Weinberg pointed out recently, Embraer's regional jets are relatively profitable aircraft, and even if the orders from Republic were to be cancelled or delayed, other airlines would almost certainly soak up those orders in the short-term. Brazil's economy continues to struggle, and double-digit inflation is pushing up the company's costs, which could weigh on profits in the near term.