What was found
WHILE ACFT IN HEAVY CHECK MAINT FOUND CORROSION ON LT CENTER(FIRST CLASS) PAX SEAT TRACK FRAME 23-29. REMOVED DAMAGED SECTION AND INSTALLED FABRICATED PARTS FOR LT INBOARD FIRST CLASS SEAT TRACK SPLICE, REF ETD2018-170-128047 AND SRM 53-00-10 R/01, RESTORED SURFACE PROTECTION REF SRM 51-10-04, 51-10-05, AND 51-10-06. ACFT REMAINS IN HEAVY CHECK UNTIL COMPLETION.