What was found
DURING ACCOMPLISHMENT OF AD, INSPECTION REPORTED CRACK INDICATIONS AT 2 FASTENER LOCATIONS ON THE HORIZONTAL STABILIZER PIVOT BOX, LEFT AND RIGHT CHORDS. THE FASTENERS WERE REMOVED AND THE HOLES WERE REWORKED, OVER SIZING THE HOLES BY .016 INCH. THE REWORKED HOLES WERE REINSPECTED AND THE CRACKS WERE VERIFIED AS REMOVED. WHILE ACCOMPLISHING THE REPAIR, MAINTENANCE DISCOVERED 1 ELONGATED FASTENER HOLE IN THE LEFT OUTER CHORD. A HFEC INSPECTION WAS ACCOMPLISHED ON THE HOLE AND NO CRACKS WERE REPORTED IAW REA B653-41539MR.