What was found
(CAN) WHILE CARRYING OUT TASK: RJ2-28-900-750 FOR FUNCTIONAL CHECK OF COLLECTOR TANK CHECK VALVES, CRACKS WERE FOUND ON THE OTBD SIDE OF ANGLE, PN 601R10011-14A IN THE RT SIDE COLLECTOR TANK. THE CRACKS ARE 1.495" AND 1.200" IN LENGTH AND WERE OBSERVED TO BE EMINATING FROM EACH OF THE 2 RELIEF CUTOUTS FOR THE STRINGERS IN THE WEB OF THE SUPPORT ANGLE. THE ACFT IS CURRENTLY DOWN FOR A SCHEDULED "C" CHECK. REPAIR PARTS FABRICATED AND HEAT TREATED IAW SRM 51-10-06 SECT 3D. ALUMINUM ALLOY FASTENERS INSTALLED IAW SRM 51-42-21 AND REPROTECTED IAW SRM 51-25-00 AND 51-25-16.