What was found
SJO - DURING C-CHECK IN THE PASSENGER CABIN, AFT LAVATORY AREA, BETWEEN BS 987 AND BSL 1016, FROM BL 0 TO LBL 19 INCH, WL 208.1, FLOOR SUPPORTS (INTERCOSTALS) WERE FOUND WITH CORROSION. REPAIRED FLOOR SUPPORT CHANNEL BETWEEN BS 987 AND BS 1006, BL 0 PER COOPESA EO COO-3-53-232-99, DATED APR 9, 1999. REPLACED FLOOR SUPPORT CHANNEL BETWEEN BS 987 AND BS 1006, LBL 20 INCH TO LBL 5 INCH PER SRM 51-10-1, PAGE 5 AND SRM 51-30-2. REMOVED CORROSION IN FLOOR SUPPORT CHANNEL, TREATED AND WITHIN LIMITS PER SRM 51-10-6, 51-10-2, AND 53-10-1, FIGURE 1 BETWEEN BS 1006 AND BS 1016, LBL 5 INCH TO BL 0. ORIGINAL THICKNESS .125 INCH AVERAGE REMOVED .004 INCH. (M)