What was found
DURING ANNUAL INSPECTION, IT WAS DETERMINED THAT BOTH UPPER AND LOWER BULKHEADS WERE CRACKED NEAR RUDDER BAR ATTACH POINTS. P/N 241001-3, 241001-4, 241001-5, AND 241001-6. BULKHEADS WERE REPLACED AND THE AIRCRAFT WAS RETURNED TO SERVICE. SUBMITTER SUGGESTS CLOSE ATTENTION BE PAID TO THIS AREA DURING ROUTINE INSPECTIONS. POSSIBLE RE-ENFORCEMENT IS NEEDED IN THIS AREA.