As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE IN HEAVY MAINTENANCE IT WAS NOTED THAT THE BOTTOM OF FRAME AND SHEAR TIE AT STR 27L TO 27R HAS CORROSION BS 990. CORROSION WAS DETERMINED TO BE OUT OF LIMITS. DAMAGED SHEAR TIE WAS REMOVED AND FABRICATED NEW FROM 7075-0, .071 DIM 4 BY 4. HEAT TREATED TO T6. INSTALLED NEW REPAIR PARTS IAW B 727 SRM 51-30-2,53-10-4. NO OTHER DEFECTS WERE NOTED. AIRCRAFT WAS RETURNED TO SERVICE.