AAR to perform heavy maintenance for Republic Airline Embraer 170/175 aircraft fleet MRO Business Today 22:45 AAR to perform heavy maintenance for Republic Airline Embraer 170/175 aircraft fleet AAR, an independent provider of aviation services has signed a four-year agreement with Republic Airline Inc. to carry out heavy maintenance checks on its fleet of 188 Embraer 170/175 aircraft.Work is set t Share this Share on FacebookTweet on TwitterPlus on Google+