As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING 4MO-P CHECK IN TASK CARD J8750-030-00-01 (27) AT MEX STATION, IT WAS DETECTED THE ROLLER OF PDU IN BALL MAT 122HF AND BALL MAT 121GF AT FWD CARGO COMPARTMENT OUT OF LIMITS. THE WO’S 7487831 AND 7487833 WERE ISSUED TO PERFORM PERMANENT REPAIR. THE PDU ROLLERS P/N G43P040-1 S/S, MANUFACTURER BOEING COMPANY WERE REPLACED IAW DMC-B787-A-50-1-01-01A-520A-A AND DMC-B787-A-50-1-01-01A-720A-A, ALL CORRECT.