What was found
NR 2 ENG HAD SEVERAL COMPRESSOR STALLS DURING CLIMB. EGT EXCEEDANCE OBSERVED. HAD THE THROTTLE BACK AT IDLE AND ENGINE STABILIZED. RETURNED TO HKG. IAW FIM 71-05 FAULT TREE 803, FOR T/SHOOTING. CHECKED INLET, EXHAUST. CHECKED MCDS, EPCS PERFORMANCE & EGT EXCEEDANCE PAGE. RT ENG PIMU BITE PROCEDURE CARRIED OUT, RESULT NORMAL IAW FIM 71-05 FAULT TREE 803, STEP 2 ENGINE TURBINE EXHAUST BORESCOPE INSPECTION PERFORMED IAW FIM 71-05 FAULT TREE 803. 71-01-00. AREA FOUND PARTICLES AND COLLECTED, STEP 3 N1 ROTOR TURN FREELY, RESULT FOUND 5TH, 6TH, 10TH STAGE HPC BLADES DAMAGED STEP 4 & STEP 5 RESULT NORMAL, STEP 6 NO UNUSUAL LIMIT IAW AMM 72-00-00 MATERIAL FOUND.