What was found
RIGHT, NR 2 ENGINE, OIL SERVICE BEFORE FLIGHT. IN FLIGHT ENGINE TWO OIL PRESSURE LOW ENG 2 OIL PRESS LO CAS ILLUMINATED APPROXIMATELY THREE HOURS INTO THE FLIGHT. CHECKLIST FOLLOWED AND BROUGHT THE NUMBER TO ENGINE TO IDLE TO KEEP THE OIL PRESSURE IN THE GREEN. CAS MESSAGE EXTINGUISHED AT IDLE. OIL FILLER CAP ON NUMBER TWO ENGINE FOUND LOOSE AFTER LANDING. ARRIVED AND FOUND SIGNIFICANT AMOUNT OF OIL TO BE COVERING LOWERCOWLING, CLEANED ENTIRE COWLING AND OPENED THE COWLING TO INSPECT FURTHER. FOUND OIL FILLER CAP TO BE LOOSE/NOT SECURE AND A LARGE AMOUNT OF OIL TO BE COVERING NEARBY COMPONENTS, CLEANED ENGINE COMPONENTS AND COWLING INTERIOR/EXTERIOR AND FOUND THE OIL LEVEL TO BE LOW. SERVICED RH ENGINE WITH 4 QTS OF 2380 UNTIL THE OIL WAS AT THE PROPER LEVEL IN REF TO EMB PRAETOR 500 AMM 12-12-01-612-801-A. PERFORMED HIGH POWER ENGINE RUN AND FOUND NO ACTIVE LEAKS DURING OR AFTER THE RUNS. HIGH POWER ENGINE RUNS AND TAXI DONE IN REF TO NJA MTX - EMBRAER PRAETOR 500 ENGINE RUN AND TAXI CHECKLIST, RH ENGINE TAKEN TO TAKE OFF 1 TIME ENGINE HAS BEEN PENALIZED FOR 1 CYCLE,