What was found
"L ENG FUEL FILTER" EICAS MESSAGE, QRH COMPLETE, ENGINE INDICATIONS NORMAL(<P>PERF FUEL FILTER ELEMENT INSPECTION, FOUND PARTICULATE < 0.25MM IN SIZE BOTH L AND R FUEL FILTERS. REPLACED BOTH FUEL FILTERS AMM TASK 73-11-02-216-001-H00. LEAK CHECKS GOOD. TRANSFERRED TO MDDR 145973. REMOVED AND REPLACED #1 AND #2 ENGINE FILTERS AND PERFORMED MICROBIOLOGICAL GROWTH TEST WITH NO DEFECTS NOTED IAW AMM 28-10-00 AND AMM 73-11-02. MDDR CLEARED. </P>)