What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT DIVERTED TO IAD DUE TO A #1 ENGINE OIL LOW PRESSURE ECAM MESSAGE AND OIL QUANITY INDICATION WAS AMBER IN FLIGHT. FLIGHT CREW FOLLOWED ECAM INSTRUCTIONS AND SHUT DOWN THE ENGINE. THE AIRCRAFT LANDED SAFELY AT IAD WITHOUT FURTHER INCIDENT. MAINTENANCE FOUND THE OIL TANK WAS EMPTY AND THERE WAS OIL LEAKING FROM THE FAN COWL AREA. MAINTENANCE FOUND THE OIL SUPPLY FILTER COVER WAS NOT SEATED AND THE FASTENERS WERE PULLING OUT. A REVIEW OF THE DFDR DATA REVEALED THAT THE ENGINE LOW OIL PRESSURE INDICATION DURATION WAS 52 SECONDS AT CRUISE SPEEDS WHICH REQUIRES THE ENGINE TO BE CHANGED. **SUPPLEMENTAL REPORT FOR AALA202308295500: MAINTENANCE REPLACED #1 ENGINE PER TASK CARD 26L40071001.** (CLOSED)