As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) ENGINE RETURNED TO MFG FOR MIDLIFE INSPECTION. DURING ENGINE DISASSEMBLY AT OGV RING REMOVAL IT WAS NOTED THAT EXTERNAL INTERMEDIATE CASING WALL HAD EXCESSIVE CORROSION THAT HAS HOLED THE CASING WALL AND GENERATED A 10" CRACK. ENGINE HAS ALSO EXCESSIVE VISIBLE CORROSION TO OTHER AREA OF CASE AND INTERNALLY OF IP COMPRESSOR.