What was found
SJO - DURING C-CHECK, THE RIGHT WING UPPER SKIN AT WBL 157 WAS FOUND WITH SPOTFACE DAMAGE. REPAIRED THE RIGHT WING UPPER SKIN SURFACE AT WBL 157, BETWEEN STRINGER 4 AND STRINGER 6 DUE TO EXISTING SPOTFACES PER COOPESA EO COO-3-57-208-99, DATED APR 2, 1999 AND BOEING FAX COO-SJO-99-0433RR, DATED APR 1, 1999. (M)