Provides Models 500S (SN 3076 thru 3323 only) 680T, 680V, 680W, 681, 690A, 690B, 690C, 690D, 695, 695A, and 695B with a later production standard single-piece tail cone. Also allows for the replacement of the ?Stinger? tail cone for Models 690A and 690B.
