What was found
RIGHT WW LONGERON 20 AFT OF FAILSAFE HAS CORROSION ON INBD SURFACE IN RADIUS STATION 970 & UPPER EDGE AT STATION 975 APPROXIMATELY. CORROSION ON LONGERON 20 INBD SURFACE & UPPER EDGE AT STATION CH 970 & 975 WING STATION BLENDED & REMOVED, BLENDED AREAS WERE FOUND TO BE WITHIN LIMITS IAW SRM 53-50-05, FIG 10. SDR INFO PN 145T8806, NSN, OTBD CHORD CORRODED FROM 970 RT - 975 RT, STRINGER 20RT. ACFT WAS GROUNDED.