What was found
DURING C-CHECK, RIGHT WHEEL WELL BS 870 AND KEEL BEAM, VERTICAL STIFFENER IS CRACKED. RUNNING FROM UNDERNEATH REINFORCE PLATE. REMOVED PNEUMATIC DUCTS RT A/C BAY AT FLOW MULTIPLIER IAW B-727 SRM 36-00-01. REMOVED STIFFENER DAMAGED IAW B-727 SRM 51-30-2, DRILLING NEW ANGLE P/N 65-18636-378 PO 312626 IAW B-727 SRM 51-30-5. TREATED AND PRIMED NEW HOLES IAW B-727 SRM 51-10-2. INSTALLED NEW ANGLE IAW B-727 SRM 51-30-2. REINSTALLED PNEUMATIC DUCTS RT A/C BAY AT FLOW MULTIPLIER IAW B-727 MM 36-00-01. LEAK CHECK FOUND NORMAL IAW B-727 MM 21-51-0 AND 36-00-01.