What was found
LEFT HORIZONTAL STAB HAS A SPOT OF CORROSION ON UPPER SURFACE AT HSBL 336. REPAIRED DAMAGE CAUSE BY CORROSION IAW REA B655-60720-MR. LEVEL 2 CORROSION, PN: 182T3200, SKIN PANEL, HSRL 334 TO HSBL 336, REAR SPAR TO REAR SPAR. ACFT WAS GROUNDED.