What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO CLT DUE TO #2 ENGINE STALLING. FLIGHT CREW REPORTED THAT THE #2 ENGINE STALLED AT CLIMB POWER AROUND 17,000 FEET MSL. STALL IMMEDIATELY CLEARED WITH NO ABNORMAL ENGINE INDICATIONS AFTERWARDS. ENGINE 2 STALLED AGAIN AT FL350 IN CRUISE POWER. STALL CLEARED WHEN POWER REDUCED. OPERATED IN IDLE THRUST TO TOUCHDOWN. LOUD BANGS, VISUAL FLAME FROM ENGINE. ERRATIC EPR. THE AIRCRAFT LANDED SAFELY AT CLT WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND DEBRIS IN THE BLEED VALVE AND TAIL PIPE AND ACCOMPLISHED A BORESCOPE INSPECTION WHERE THEY FOUND COMPRESSOR BLADES MISSING. IT WAS DETERNMINED THAT THE ENGINE WILL BE CHANGED. (OPEN)