POST FLT; PREFLT INSPECTION BY THE FLC REVEALED LARGE OIL LEAK FROM BOTH ENGS.

Narrative

PICKED UP ACFT FROM MAINT; PERFORMED FIRST FLT OF DAY SYS CHKS; FUELED AND PREFLTED ACFT AND FLEW REVENUE FLT FROM YKM-SEA. UPON LNDG IN SEA; LARGE AMOUNTS OF OIL WERE OBSERVED LEAKING FROM BOTH ENGS; OIL WAS ALSO OBSERVED ON COWLS; WINGS; FLAPS AND INSIDE LNDG GEAR WHEEL WELLS. MECHS WERE CALLED; AND REMOVED COWLS AND OBSERVED AN OIL LINE ON BOTH ENGS (THE SAME LINE ON EACH SIDE) DISCONNECTED. 4 1/2 QUARTS OIL ADDED TO ENGS TO BRING THEM TO NORMAL LEVELS. OIL WAS CLEANED FROM ACFT AND A LEAK CHK PERFORMED. THE ACFT HAD JUST BEEN RELEASED FROM A #4 DETAIL CHK AND A ROUTINE CHK. AS I UNDERSTAND IT; THEY WERE UNDER TIME PRESSURE TO FINISH THIS PROC; AND SOME BASIC MAINT PROCS WERE OVERLOOKED. APPARENTLY THE OIL SYS WAS NEVER LEAK CHKED AFTER THE LINES WERE REMOVED FOR WHATEVER REASON. A MAINT INSPECTOR IS SUPPOSED TO CHK THE MECH'S WORK BEFORE (ACFT) IS RELEASED FOR FLT. THIS ALSO WASN'T FOLLOWED. WE HAD NO INDICATIONS OF ANY PROBS. ALL TEMPS; PRESSURE AND INSTS WERE NORMAL. HAD THE FLT BEEN LONGER THAN 30 MINS; WE WOULD HAVE BEEN FACED WITH A DUAL ENG FAILURE. NOT A PLEASANT THOUGHT. IT'S NOT ALWAYS THE PLT'S FAULT.