What was found
ENGINE FLAMED OUT IN HOVER. EXPERIENCED SUCCESSFUL RESTART ON FIRST ATTEMPT. TWO MINUTES RUN AT 100 PERCENT N2 WITH BOOST PUMPS OFF - CHECKED OKAY. SHUT DOWN ENGINE. BLED SYSTEM, FOUND AIR IN ENGINE MOUNTED FUEL FILTER HOUSING. RAN ENGINE, SHUT DOWN, BLED FILTER AGAIN - NO AIR FOUND. AIRCRAFT RETURNED TO SERVICE. NOTE: AIRCRAFT WAS JUST RETURNED TO SERVICE AFTER APPROXIMATELY 5 WEEKS IN PAINT SHOP ABOUT TEN HOURS BEFORE FLAMEOUT.