What was found
DURING HEAVY MAINTENANCE: RH WING UPPER SURFACE SKIN WITH CORROSION AT STGR 15 BETWEEN RIB 14 / RIB 15; REF. MEX WO: 1318489,1327754,1328846 N/R S/N: 00104. : CORROSION POINTS AT RH WING TOP SKIN UPPER SURFACE BETWEEN RIB 14/ RIB 15 STGR 15, WAS REMOVED AND REPAIRED I.A.W. MEXICANA EO TRE2057203 & JB EC A24-1207-01.