What was found
TEST FLIGHT DISCREPANCY . . 1 ENG LOW OIL PRESSENG SHUTDOWN ADDED SDR ENGINE WAS SHUT DOWN DUE TO LOW OIL PRESSURE AT 58 PSI, MIN. 60 PSI REQUIRED. ENGINE THEN WINDMILLED FOR 43 MINUTES; HOWEVER, WE DO NOT KNOW HOW LONG IT WINDMILLED BELOW 5PSI. OIL PRESSURE. EN GINE OIL QUANTITY INDICATED ?ZERO? ON LANDING, VISUAL OF TANK INDICATOR ALSO DID NOT SHOW ANY OIL IN TANK. T/S OF E1 IS IN WORK REF. AMM 72-00-00-200-021-A. PCMCIA BEING SHIPPED TO SFOEP. THIS IS FOR #1 ENGINE SN. V11086 (TSI= 5399 AND CSI= 2765). NR 1 ENG WAS REPLACED ON TASK CARD #31-7100-1-4900/15102. REMOVED AND REPLACED ENGINE IAW CARD # 31-7100-1-4900/15102.