What was found
IAH - FLT 2593, THE CREW REPORTED STRONG FUEL SMELL AFTER T/O APU POWERING, PACKS SMELL GOES AWAY AFTER SWITCHING PACKS TO ENG BLEED. A/C RELEASED IAW MEL 49-00-00 CAT "C" CONT #138323, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE. IN EWR ON 01/31/08, MAINTENANCE OPERATIONALLY CHECKED THE PACKS USING THE APU WITH NO DEFECTS NOTED. REMOVED THE MEL, AND THE AIRCRAFT WAS APPROVED FOR RETURN TO SERVICE.