What was found
DURING A SCHEDULED MAINTENANCE VISIT WHILE PERFORMING A HORIZONTAL STABILIZER ROLLER BRACKET INSPECTION AS PART OF THE (A) LEVEL INSPECTION BOTH THE LT AND RT IB HORIZONTAL STABILIZER ROLLER BRACKET RIB STRUCTURES WERE FOUND CRACKED. DETAILED INSPECTION INSTRUCTIONS OF THIS AREA ARE OUTLINED IN COMMUNIQUE' NR 70. TO FACILITATE MAINTENANCE THE HORIZONTAL STABILIZER WAS REMOVED FROM THE AIRCRAFT. THE LT AND RT HORIZONTAL STABILIZER RIBS WERE REPLACED IAW THE SRM. THE HORIZONTAL STABILIZER WAS REINSTALLED AND OPERATIONAL CHECKS OF THE STABILIZER WERE PERFORMED. THE AIRCRAFT WAS RETURNED TO SERVICE.