As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NUMBER 1 PACK PRODUCES AN ODD SMELL AS IF THERE IS ELEC BURNING. VISUAL INSPECTION AT PACKS INLET & OUTLET AT PACK 1 BAY, NO ABNORMALITIES NOTED. REF ITEM 3 DETAILED INSPECTION ACCOMPLISHED & FOUND EE SUPPLY FAN AT FAULT. FAN DEACTIVATED & OPERATIONS CHECKED OF ALL PACKS NORMAL. NO BAD ODOR OR SMOKE NOTICE. EE SUPPLY FAN TRANSFERRED TO MDDR 54582 IAW DDG 21-58-06 CAT C.