What was found
DURING HEAVY CHECK, LEFT HORIZONTAL STABILIZER L/E, RIB 4 IS CRACKED AT RIVET FLANGE. MAINTENANCE CUTOUT DAMAGE ARE IAW ETD 2015-170-062705 FABRICATED REPAIR AND FILLER DOUBLER IAW ETD 2015-170-062705. PERFORMED HFEC ON FABRICATED PARTS, NO CRACK NOTED IAW 51-00-00-918-803A. TREATED AND PRIMED IAW ETD 2015-170-062705. TOP COATED FASTENERS IAW SRM 51-23-05, 51-23-06.