What was found
DURING ROUTINE C-CHECK INSPECTION, CORROSION WAS DETECTED ON THE LEFT HORIZONTAL STABILIZER LEADING EDGE STATION XFS 178 TO XFS 285. REPAIR ACCOMPLISHED, REMOVAL OF DAMAGED AREA, FABRICATION AND INSTALLATION OF AN INTERNAL FILLER AND REPAIR DOUBLER IN ACCOURDANCE WITH THE DOUGLAS STRUCTURAL REPAIR MANUAL AND ENGINEERING AUTHORIZATION 28260-5508-2002-99.