What was found
FLT#7, JFK-LHR. (ETOPS) 'BLOWER VENT FAULT ( BLOWER FAN - NO AVNCS SYS FAULT ECAM CAUTION ); REMOVED AND REPLACED BLOWER VENT FAN ( 20HQ) IAW AMM 21-26-51, PERFORMED OPS TEST IAW AMM 21-26-00-710-001. TEST OK, THIS CLEARS MDDR 553979, MX-4 UPDATED, PLACARD REMOVED.