What was found
***WHILE A/C WAS OUT OF SERVICE FOR HEAVY CHECK*** FWD FUSELAGE FLOOR STRUCTURE CROSSBEAM FR12 BL0, ANGLE FOUND CRACKED. FWD FUSELAGE FLOOR STRUCTURE CROSSBEAM FR12 BL0, ANGLE REPLACED IAW SRM 51-41-01. A/C REMAINS OUT OF SERVICE FOR HEAVY CHECK COMPLETION.