What was found
DURING ROUTINE LINE MAINTENANCE AT ILN, FOUND THE FUSELAGE SKIN CRACKED 1 INCH LONG AT STA 897 AND LONGERON 29 RT. SKIN WAS FOUND TO BE CORRODED BEYOND LIMITS ON THE INTERIOR SURFACE UNDER LONGERON 30. INSTALLED SKIN SPLICE, REPAIRED IAW DC-9 SRM 53-04 FIG 12 C, USING 2014-T6 .063 PO 408449576 FOR SKIN, AND 2014-T6 .063 PO 408450124, 2014.T6 .025 PO 04844319 FOR DOUBLER. REINSTALLED LOWER FORWARD AND AFT DOOR JAMB CORNER REPAIR IAW REA D953-51557-MR.