What was found
DURING A C-CHECK, THE LOWER FUSELAGE SKIN AT THE ADF ANTENNA AREA BETWEEN FR 23 TO 23A, STRINGERS 21L-21R WAS FOUND TO BE CORRODED BEYOND LIMITS. MAINTENANCE REPAIRED THE LOWER FUSELAGE SKIN AT THE ADF ANTENNA AREA BETWEEN FR 23 TO 23A, STRINGERS 21L-21R IAW EO. (K)