What was found
DURING HEAVY CHECK MAINTENANCE FOUND CORROSION ON FWD WET AREA FLOOR DOUBLER OTBD OF LEFT TRACK AT FR 16 AS MARKED. REMOVED FLOOR DOUBLER. O/B OF LEFT TRACK AT FRAME 16 (FWD WET AREA),FABBED NEW FLOOR DOUBLER AND INSTALLED REF EMB SRM 51-40-08. TREATED, PRIMED AND TOP COATED THE 9 HOLE DOUBLER REF SRM 51-23-04, 51-23-05 AND 51-23-06. A/C REMAINS IN CHECK.