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AMC E 520(a)  Strength - High Cycle Fatigue

ED Decision 2007/015/R

In order to minimise the adverse consequences of Failures due to unpredicted high cycle fatigue it is recommended that, normally, the relative fatigue strengths of the blade/disc are graded such that they lie in the ascending order: blade form, blade root, disc blade attachment, disc rim.

[Amdt. No.: E/1]