Lynn
--- Begin Message --- Hi Dick; As Kevin and your IA indicated, yes, you need the backup plates. You can save $ by ordering the inspection plates, backup rings and nut plates by part number and then using your own rivets and nylon washers. As I recall, I totaled the cost of everything by PN and it comes to a little less than $60.
Let me know if you need the part numbers, and I will look through my mess to see what I can find.
Lynn
--- End Message ---
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