As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR CONDITIONER IDLER PULLEY WAS VERY LOOSE. FOUND THE PULLEY BOSS THAT FITS INSIDE OF THE BEARING (PN 203SZZ) WAS VERY WORN. BEARING COULD BE TURNED BY HAND, B4UT WAS ROUGH FEELING WHEN ROTATED. SUBMITTER SUGGESTS POSSIBLY A BETTER QUALITY BE6ARING AND A BETTER FIT BETWEEN THE PULLEY AND THIS BEARING WOULD HELP.