As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WORKING MSU TO BORESCOPE THE NR 2 ENGINE DUE TO PARAMETERS SHIFTING (N2 F/F & EGT UP). ATL BORESCOPE TEAM FOUND THE 6TH STAGE HPC HAD BLADE TIPS MISSING AND THE 12TH STAGE HPC HAD BLADES WITH TEARS IN THE MID BLADE AREA. FOUND BOTH AREAS TO BE OUT THE ALLOWABLE MM IN SERVICE DAMAGE LIMITS. ENGINE CHANGE IN PROGRESS.