What was found
**WHILE AIRCRAFT WAS OUT OF SERVICE FOR HEAVY CHECK** MAINTENANCE FOUND 633-58 CF III INTERNAL LOWER STRUCTURE FR82 STR 28 - 29R. SHEAR CLIP FOUND CORRODED. REPLACED SHEAR CLIP IAW SRM 51-41-01, 5141-02, 51-43-03. AIRCRAFT REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.