What was found
LEFT HORIZONTAL STABILIZER AT REAR SPAR, O/B TO I/B AREA, AT NR 4 ELEVATOR HINGE SUPPORT SEVERAL SCREWS CORRODED. REMOVED LIGHT CORROSION ON SEVERAL SCREWS AT LEFT HORIZONTAL STABILIZER AT REAR SPARE AT NR 4 ELEVATOR HINGE SUPPORT IAW B717 SRM 51-1-04.