What was found
DURING ROUTINE MX, A CRACK WAS FOUND ON LOWER LT ENGINE MOUNT BRACE. THERE IS NO DAMAGE HISTORY ON THE ACFT. THE MOUNT DOES NOT HAVE RELIEF HOLES FOR WELDING, AND THUS CAN`T ACHIEVE FULL PENETRATION ON THE WELDS THERE. COMBINED WITH FATIGUE AND VIBRATION, THIS COULD HAVE CAUSED THE MOUT TO CRACK. ON NEWER ACFT, MFG HAS GUSSET PLATES INSTALLED IN THE WEAK AREAS OF THE MOUNT. RECOMMENDATION IS FOR VERY CLOSE VISUAL INSP OF THIS PARTICULAR AREA AT 100 HR INTERVALS UNTIL GUSSET PLATES ARE INSTALLED, OR NEW STYLE MOUNT IS INSTALLED.