What was found
ON DEPATURE, NR 1 ENGINE MADE AT LEAST 2 LOUD BANGS, SHOOK THE ACFT AND CREATED A YAW. TOWER AND PAX REPORTED LARGE FLAMES SHOOTING OUT OF THE ENGINE. ENGINE ROLLED BACK ON ITS OWN. REDUCED THROTTLE AND IT STABLIZED. PERFORMED NR 1 ENGINE BORESCOPE INSPECTION, FOUND ENGINE HIGH PRESSURE COMPRESSOR STAGE 2 HAD A ROUND BOTTOM DENT ON 1 EA BLADE AT THE LEADING EDGE, 0.395 FROM THE TIP OF THE LEADING EDGE. THE DEPTH OF THE DENT IS 0.051 DEEP. ACCORDING TO AMM 72-00-00-200804-F00, SUBTASK 72-00-00-210-018-F00 (G) (2) (D), THE ALLOWABLE LIMIT IS 0.030 DEEP. BLADE IS OUT OF LIMITS.