What was found
WHILE ACFT IN HEAVY CHECK MAINT FOUND CORROSION FWD WET AREA FWD R.HAND SILL BETWEEN FR.13 AND FR.14,REMOVED AND REPLACED RH SILLBETWEEN FR.13-14 REF. E175 SRM 51-40-08,RESTORED SURFACE PROTECTION REF SRM 51-23-06. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.