What was found
THE RT MLG HYDRAULIC TUBE (P/N BURST WHEN HYDRAULIC PRESSURE WAS APPLIED IN THE SYSTEM DURING MLG TESTING AND ADJUSTMENT, FOLLOWING INSTALLATION OF THE MLG ON B738 REG. OY-ASF DURING BASE MAINTENANCE AT THE MAGNETIC MRO FACILITY . THE LANDING GEAR WAS SUPPLIED BY MAGNETIC TRADING. AS PER FEEDBACK FROM MAGNETIC TRADING, THEY NEVER PERFORM PHYSICAL MLG INSPECTION. INSTEAD, UPON PURCHASING, INSPECTION IS MOSTLY DONE BY THE WORKSHOP (IF LANDING GEAR IS UNSERVICEABLE OR COMING FOR RECERTIFICATION) OR BY THE LOCAL MRO WHO IS INSTALLING LANDING GEAR ON THE AIRCRAFT. DURING MLG INSTALLATION AT MMRO IN TLL, NO IRREGULARITIES ON THE HYDRAULIC TUBE WERE NOTICED DURING THE INSTALLATION PROCESS UNTIL THE TUBE BROKE AND STARTED EMITTED HYDRAULIC FLUID DURING THE LANDING GEAR TESTING. THE LANDING GEAR SET WAS OVERHAULED. AFTER THAT, THE LANDING GEAR WAS STORED, AS PER THE EM . INCIDENT REPORT HAS BEEN FORWARDED TO THE WORKSHOP WHERE THE MLG OVERHAUL WAS LAST PERFORMED.