What was found
NUMBER 1 ENG OIL PRESS DISPLAYED AN AMBER BOX, 15 MIN AFTER DEPARTURE, CLIMB POWER FL335 TO FL350. AT CRUISE, PRESS WENT INTO GREEN. AMBER BOX APPEARED AGAIN WITH A LOSS OF 3 QTS OIL, 20 INTO FLIGHT. PRECAUTIONARY SHUTDOWN INFLIGHT, WIND MILLED FROM 1422Z - 1446Z, QTY WAS AT 12 QTS AT SHUTDOWN. FOUND OIL CAP OPEN, SERVICED ENG WITH 6 QTS OIL. CLEANED COWLS, COMPLIED WITH WINDMILL MX IAW MM 72-00-05-6-1 STEP 11. CREW RAN ENG FOR 5 MIN, NO DEFECTS NOTED ALL ENG INDICATIONS WERE NORMAL. ACFT OK FOR SERVICE.