As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ORD - FLT 1487 - EN ROUTE ORD-LAX, DETECTED A LOUD BANG AT NR 2 SIDE ENGINE. SHUT DOWN NR 2 SIDE ENGINE. RETURNED ORD AND LANDED WITHOUT INCIDENT. THE 3RD AND 4TH STAGE TURBINE BLADES FAILED AT OR NEAR THE ROOT. REPLACED NR 2 ENGINE. SYSTEM GROUND CHECKED NORMAL OPERATION. (M)