What was found
TRAILING EDGE TIP WEIGHTS (UP TO 5 EA) AND ATTACHMENT BOLT (1 EA) DEPARTED FROM TIP RIB ASSEMBLY AND WENT THROUGH TIP CAP. DURING THE POCKET REPLACEMENT PROCESS AT SUPPLIER, A TIP RIB WAS INSTALLED IN THE NEW POCKET ASSEMBLY THAT WAS MISSING AN INBOARD DOUBLER , TO WHICH THE TRAILING EDGE NUT PLATE AND WEIGHT PACKAGE IS ATTACHED. WITHOUT THE REINFORCEMENT OF THIS INBOARD DOUBLER, IT APPEARS THAT THE STRESS APPLIED DURING FLIGHT CAUSED THE NUT PLATE TO PULL OUT OF THE TIP RIB AND THE WEIGHTS AND ATTACHMENT BOLT TO EXIT THROUGH THE TIP CAP.