1/28/2009 .. 1/30/2009 Section 18-5 Steps 5 to 9. Using both rivets and Pro-Seal I attached the Fuel Cap Flange T-406B and the Vent Tank Bracket T-1008 to the Tank Skin T-1001-L. Then the real work began as I attached using both rivets and Pro-Seal the Tank Rib sets T-100CR, T-1004-L T-1003-L to the Tank Skin T-1001 using AN426ADAD3-3.5 rivets. Then attached the J-Channel Stiffener T-1009 to the Tank Skin by first adding the Pro-Seal substance to the Tank First and sliding the J-Channel through the Rib openings. This helps avoid “smearing” the Pro-Seal. Then finally Pro-Seal and riveted the previously assembled Tank Attach Bracket Sub-Assembly T-1005-L to the Tank Skin as shown in Figure 1. This was very time consuming process. I completed this for only the Left tank and averaged about 1 hour per Rib (there are six of them) plus other required time for a total time of about 12 hours.