What was found
LCQ - MAJOR REPAIR - DURING C-09 CHECK EXFOLIATION CORROSION WAS FOUND ON THRESHOLD SUPPORT BS 1640 TO BS 1680, LBL 60. MAINTENANCE REMOVED DAMAGED THRESHOLD SUPPORT BS 1661 TO BS 1680, LBL 60; FABRICATED A REPLACEMENT THRESHOLD SUPPORT; INSTALLED REPAIR PART IAW B757-200 SRM 51-40-05, PG. 1-2.