What was found
OIL FILTER WAS INSTALLED ON 6-28-97. NOTED AT THE TIME THAT THE LOCKING TAB WAS NEARLY FLAT AGAINST THE BOWL OF THE CANNISTER, SUCH THAT THE TAB HAD TO BE BENT SLIGHTLY TO ADMIT .032 INCH SAFETY WIRE. NO LEAKS WERE FOUND AFTER A GROUND RUN-UP. AFTER 3 HOURS OF SERVICE, THE FILTER DEVELOPED A LEAK AROUND THE BASE OF THE LOCKING TABS CAUSING A LOSS OF 1 QUART IN A 20 MINUTE FLIGHT ON 7-14-97. INSPECTION OF THE FILTER CASE REVEALS CRACKS AT THE SITE OF EACH OF THE 4 SPOT WELDS WHICH ATTACH THE LOCKING TABS.