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Originally Posted by The Other Guy I have heard that every piece of equipment on the B-52 has been changed over the years. |
Not only equipment but it's whole structure is replaced piece by piece over the years.
A 20 years old aircraft has no part on it that it left the factory with.
All this is due to aging / stressed material. Even unused spare parts in stock have an expiration date (like food). After expiration these parts have to be certified new or they go to the scrap yard.