What was found
DURING SCHEDULED A, B, AND C INSP FOUND ROLLER BRACKETS CRACKED ON LT AND RT INBD FWD HORIZ STAB RIBS. NEW RT INBD RIB ASSY HAD BEEN INSTALLED 1190.3 HRS PREVIOUSLY FOR REPLACEMENT OF CRACKED ROLLER BRACKETS. INSTALLED NEW IMPROVED PN RIBS AND BRACKET ASSY. IAW COMMUNIQUE 83. RECOMMEND MFG ISSUE A RECOMMENDED TYPE SB OR KIT TO REPLACE THE ORIGINAL TYPE BRACKET ASSY AND RIBS WITH IMPROVED TYPES. HAVE NOTED NUMEROUS WITH THIS CONDITION, IN SOME CASES THE REPLACEMENT ORIGINAL PN COMPONENTS ALSO CRACKING FOLLOWING REPLACEMENT.