What was found
PILOT NOTED LOW OIL PRESSURE AND INCREASED OIL TEMP IN FLIGHT. PILOT LANDED AND ACFT WAS INSPECTED. ENGINEER FOUND A LARGE OIL LEAK IN THE AREA OF THE OIL COOLER. INSPECTION FOUND AN OIL LINE SHEARED AT A SWAGE LOK FITTING THAT WAS INSTALLED AS PART OF STC SH06-43 CONFIGURATION 2. FURTHER INVESTIGATION DETERMINED THAT SWAGE LOCK FITTING REQUIRES A MINIMUM LINE THICKNESS OF 0.035". LINES HAVE A WALL THICKNESS OF 0.018" - 0.020". COMPANY REMOVED STC SH06-43 MODIFICATION FROM ALL 16 COMPANY ACFT UNTIL SUCH TIME AS A SUITABLE AMENDMENT CAN BE MADE TO THIS APPROVAL.