What was found
TOWER ADVISED FLUID COMING OUT OF LT ENGINE DURING CLIMBOUT. TOP OF CLIMB, BALANCED FUEL TANKS, IN 15 MINUTES, LEFT TANK WAS 800 POUNDS LOW. OPENED NR 1 ENGINE COWL AND FOUND FUEL FILTER BOWL SEAL LEAKING. REMOVED AND REPLACED FUEL FILTER AND SEAL IAW B717 AMM 73-11-01. LEAK CHECK GOOD IAW B717 71-00-11.