What was found
DURING HEAVY MAINTENANCE: RH WING UPPER SURFACE SKIN WITH CORROSION POINTS AT STGR 13 BETWEEN RIB 11 / RIB 12; REF. MEX WO. 1318489,1327754,1328846 N/R S/N : 00091 - CORROSION POINTS AT RH WING TOP SKIN UPPER SURFACE BETWEEN RIB 11/ RIB 12 STGR 13, WAS REMOVED AND REPAIRED I.A.W. MEXICANA EO TRE2057203 & JB EC A24-1207-01.