Attach outer wings, but first you have to place 2 formers (F2 and F3) inside each wings.
Attach engine mountings and flap hinges like the above picture
Combine the left engine parts, glue the glue-tab (G14) on the inside of part 31 and then attach with part 32 and part 33. Combine part 26 and 35 and then insert it inside part 33. Close the engine nacelle with part 34. Finish it with part 37 and 38. Make sure all seams are on the bottom and align them with the engine nacelle's seam.
The right engine parts are almost identical with the left one, but with some parts mirrored. Make sure you show part 58 with the correct reflection texture on the side.
Slip through part 39 inside to the bottom of part 27. Attach all 4 wheels (9) on each sides of part 27. Attach accessories part 30 on its place.
Before inserting the previous landing gear set inside the wing, attach all accessories part first.
Before inserting the front landing gear set inside the wing, attach all accessories part first.
HAVE FUN!