Four seat belt attachments are required to be attached to seat ribs. The attachments inculde two lugs and one support plate for each assembly. Picture 1 shows a left and right rib with trial fitting of the parts.
Page 21-05 Step 3 is confusing. It should explain that there are 4 K1000-08 nutplates to be attached to each of two ribs. Similarly, the subsequent text should indicate that "the five remaining nutplates" refer to each of the two assemblies.
