As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GNDED. FLIGHT CREW REPORTED A LOUD BANG FROM THE LT ENG ALONG WITH SEVERE YAWING TO THE LT DURING TAKEOFF. ABORTED THE TAKEOFF BELOW 80 KNOTS & RETURNED TO THE GATE UNDER ITS OWN POWER. PERFORMED BORESCOPE OF NR 1 ENG IAW JC 26L000072007 A5 ENG HPC & FOUND 9TH STAGE BLADES TO BE SEVERELY DAMAGED & OUT OF LIMITS. REPLACED NR 1 ENG & ACCOMPLISHED A SATISFACTORY LEAK & OPERATIONAL CHECK IAW TASK CARD 26L40071004.