As an E-175 was being pushed back for departure to PHL, its right wingtip hit the APU exhaust of an empty A320 parked at the gate awaiting a flight to CLT. Both planes were damaged, both were taken out of service, no one was injured. The 36 passengers on the E-jet were placed on other flights.
http://www.boston.com/news/local/rhode_ ... nd_mishap/
