What was found
AFTER TAKEOFF, RECEIVED AN EXTREME AIR NOISE FOR ABOUT 20 SECONDS, MUCH MORE THEN JUST PACK HIGH FLOW. AT THE SAME TIME, THE F/A'S REPORTED A ELECTRICAL BURNING ODOR IN FORWARD GALLEY, ODOR WENT AWAY AS SOON AS FLOW STOPPED. IAW FAULT ISOLATION MANUAL, PERFORMED AMM PAGE BLOCK 21-23-07/801 AND INSPECTED ALL DUCTS SURROUNDING THE FORWARD GALLEY CABIN CEILING, CABIN FLOOR AND FOUND NO LEAKS OR ABNORMAL ISSUES. OPERATED PACKS AND FOUND NO ISSUES AT THIS TIME.