What was found
DURING A 50-HOUR INSPECTION, THE NR 4 T/R BEARING HANGER SUPPORT WAS FOUND LOOSE FLOATING UP AND DOWN ON THE ATTACH BOLT. NR 7 HANGER SUPPORT WAS FOUND TO BE MAKING MUD AT CONTACT AREA WITH TAILBOOM BRACKET. FOUND ATTACH BOLT P/N NAS6604D65 WORN AND STEPPED ON NR 4 SHAFT AND ONLY SLIGHTLY WORN ON NR 7 SHAFT. THE 407 MM REQUIRES TORQUE OF 50-70 INCHES/POUNDS. NEITHER CHAPTER 65 OR PARAGRAPHS 1-13 TORQUES STATE WHETHER OR NOT NUT DRAG SHOULD BE FACTORED IN. ALSO, DRAWING IN THE TAILBOOM BRACKET WILL EFFECT THE FINAL TORQUE.