What was found
DURING A SCHEDULED MAINTENANCE VISIT WHILE PERFORMING A HORIZONTAL STABILIZER ROLLER INSPECTION AS PART OF THE (B) LEVEL INSPECTION THE LT IB HORIZONTAL STABILIZER RIB STRUCTURE WAS FOUND CRACKED NEXT TO THE SIDE ROLLER BRACKET. DETAILED INSPECTION INSTRUCTIONS OF THIS AREA ARE OUTLINED IN MFG COMMUNIQUÉ NR 70. THE HORIZONTAL STABILIZER WAS REMOVED AND THE ROLLER RIB ASSEMBLY WAS REPLACED IAW THE MFG STRUCTURAL REPAIR MANUAL. THE HORIZONTAL STABILIZER WAS REINSTALLED AW THE MM.