As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT ELEVATOR TIP RIB WAS FOUND PERFORATED BY CORROSION UNDER MASS BALANCE WEIGHTS C2TE-113 AND DASH 115. ONLY ONE FASTENER WAS RETAINING THE WEIGHTS. THE LEAD WEIGHTS ARE ON BOTH SIDES OF THE ALUMINUM RIB AND ARE RETAINED BY STEEL SCREWS. THE CONDITIONS ARE PERFECT FOR CORROSION.