Section 18.104.22.168. Fail Safe Multiple Load Path Structure
An initial inspection interval is established to insure
detection of any premature primary element failure. The initial inspection interval is dependent on the particular
geometry and degree of inspectability, as given in Table 1.3.5. The initial inspection interval should not
be greater than one half of the time to primary load path failure from the
specified initial flaw for primary elements plus one half of remaining time to
failure of adjacent structure from its flaw size at the time of primary element
failure. These initial flaw sizes are
specified in Section 1.3.4.
Subsequent inspection intervals are also based on the degree of
inspectability of the primary element as given in JSSG-2006 Table XXXIV and
repeated in Table 1.3.6.