Sect 9-2 Step 4: Used hand seamer to adjust flanges to 90 deg on both E-904 Inboard Ribs and both E-903 Outboard Ribs. At Step 5, fluted each to insure all holes along flanges in a straight line - considerably more needed than typical on prior parts. Re-checked the 90 degs, and tweaked a few locations. Per instructions, insured holes are straight by "cleco'ing" the Counterbalance Skings to the Ribs. Perfect fit and alignment.
Steps 6 & 7: Assembled Tip Rib Assembly. Cleco'd, and Final Drilled (#30 Reamer) holes in mating Ribs, and FD the holes (#40 reamer) in flanges to Counterbalance Skins (2X).
Sect 9-03, Step 1: cut out templates from page 29 (actually used photocopies after insuring true 1:1 size). Worked well to apply spray adhesive to each surface. Bandsaw cut out Foam Ribs. Used a gentle touch on 6" Disc sander to finish edges to the template's lines. All Foam Ribs finish sanded, and ready to use.
Sect 9-3: Step 2: For Trim Tab Skings, removed hatched areas per plans for Close-Out Tabs at each end.
