What was found
THESE PARTS WERE REMOVED FROM SERVICE AT ENGINE TSO OF 1493.7 HOURS (PRIOR TO THE ENGINE TBO OF 3000 HOURS). THE FOLLOWING PARTS (COMPRESSOR DISK) WERE DEEMED SCRAP DUE TO NOT BEING ABLE TO READ PN AND/OR SN BECAUSE OF CORROSION. WE SUSPECT THAT THE CAUSE OF EXCESSIVE CORROSION IS THE WINDAGE TABS NOT BEING ADEQUATELY COATED. (NOTE: DUE TO PN AND SN OF PARTS BEING NOT LEGIBLE, THE PN AND SN WERE OBTAINED FROM PREVIOUS RECORDS/DISK SHEETS). (K)