What was found
FWD CARGO COMPARTMENT FLOORBEAM AT FR 21 HAS A CRACK AT VERTICAL (UPPER END) BETWEEN SEAT TRACKS R2 AND R3, CRACK MEASURES APPROX .75 IN LONG. REF AMM 53-13-11-06-0. CRACK IS ON VERT STIFFENER. REMOVED DAMAGED AREA, NDT CHECKED FOR CRACKS-CHECKED GOOD, FABRICATED REPAIR ANGLES AND INSTALLED REPAIR ANGLES IAW SRM 53-10-15.