1. Four holes were countersunk #40 on each of the F-01242. 2. Nutplates were riveted to F-01242 L&R. 3. Four holes were dimpled #40 on rib #5 as well as on the nutplates, these were riveted together. 4,5 F-01242-R, one F-1252 and the pulley bracket assembly were riveted to #5 and then to rib #6. 6,7. Four holes were dimpled #40 on rib #4 as well as on the nutplates, these were riveted together. 8,9.F-01242-L, one F-1252 and the flaperon mixer arm assembly were riveted to #4 and then to rib #3.
