Sect 9-15, Steps 1 & 2: Prepped 4 Skins fro bonding Foam Ribs (8 places) and T.E.'s. Sect 9-16, Steps 1 & 2: Riveted Gusset to LH Root Rib (once again, proving critical to permanently label parts for orientation. I masked over markings in small zone with undisturbed Alclad when spraying primer on parts that will be difficult to differentiate from duplicates, etc )
Riveted E-903 and E-904 Tip Ribs to each other for Left and Right sides. Two flush rivets are located where counterweights will be attached. All others are 470 Universal style. Oriented so shop ends will be covered by composite tips at final assembly.
