What was found
CLIMBING THRU FL330, LEFT ENGINE OIL PRESSURE DROPPED TO 1 PSI. EICAS RED BOX, L ENG OIL PRESS, AND A BUMP FELT. RAN QRH, EVENTUALLY SHUT DOWN ENGINE, DECLARED EMERGENCY, RETURNED TO INDY. OIL TEMP DROPPED FROM ~115 TO 85. EMERGENCY DECLARED. PER THE DFDR DOWNLOAD, THIS ENGINE WAS RAN FOR 6 MINS WITHOUT OIL PRESSURE. PER ERSA 24-01134, FOUND METAL ON SCAVENGE MAGNETIC CHIP DETECTORS. ENGINE S/N 707368 INSTALLED PER W/C "7100000-01-04. COMPLETED SERVICEABLE ENGINE INSTALLATION OF #1 ENG REF WIC 71000000-01-04. ALL TEST PASS. ACFT OK TO CONTINUE