What was found
UPON A SCHEDULED INSPECTION AT AERO CORP IN LAKE CITY, FL, THE BS 760R RIB CHORD UPPER VERTICAL FLANGE FORWARD OF FRAME IS CRACKED ACROSS HOLES AND FROM THE LOWER HOLE DIAGONALLY AFT .375 INCH. REMOVED EXISTING REPAIR. FABRICATED AND INSTALLED SHIM AND FREEZE PLUGS IAW B727 SB 727-57-0112. (M)