What was found
DURING REPAIR OF FUEL PANEL, PN 611BB, RT CENTER STUB WING, THE STATED ELBOW WAS FOUND LOOSE AT BOTH B-NUTS, ONE ONLY ENGAGED BY HALF OF A TURN. NUTS WERE TIGHTENED AND TORQUED IAW MAINTENCE. THIS AREA IS NOT INSPECTED UNTIL THE PHASE 5 1,200-HOUR INSPECTION. SUBMITTER SUSPECTS LOOSE NUTS WERE NEVER TIGHTENED AT FACTORY.