What was found
BLOWER FAULT DISPLAYED ON UPPER ECAM SCREEN. BLOWER FAULT DISPLAYED ON UPPER ECAM SCREEN. MAINTENANCE CHECKED AND FOUND BLOWER FAN 20HQ SEIZED AND CIRCUIT BREAKER AD10 TRIPPED. REPLACED AEVC BLOWER FAN 20HQ (MR21211, 644-0089) PER MM 21-26-51. SYSTEM OP-CHECK GOOD. FAN WAS ORIGINALLY REPLACED BY BORROWED PART FROM AMERICA WEST S/N 3976. BORROWED PART WAS REPLACED AND RETURNED TO LENDER WITH UAL PART INSTALLED ON AIRCRAFT. POTENTIAL CAUSE OF FAILURE WAS SEIZED BEARING. UAL HAS PROGRAM IN PLACE TO REPLACE WITH CERAMIC BEARINGS.