As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HEAVY CK / COE / MAJOR REPAIR / LEVEL 2 CORROSION: LT HORIZONTAL STABILIZER LOWER AFT SKIN TO REAR SPAR CHORD SEAM HAS 3 VOIDS IN SEALANT WITH LEVEL 2 CORROSION. (24" IB OF RIB 3, 34" IB OF RIB 3 AND 14" IB OF RIB 3) REPAIR PER STRUCTURAL REPAIR INSTRUCTIONS FROM ATR AND SRM 55-11-10.