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WFD (Widespread fatigue damage)

WFD (Widespread fatigue damage)

How is it keeping Aircraft batch production & Airlines always under watch?

  • WFD in an aircraft chcl3 lewis structure is known by the simultaneous presence of cracks at multiple structural areas that are enough in size & density so that chcl3 lewis structure will no longer be under damage-gdt tolerance limits & could catastrophically fail.
  •  In April 1988, aeging Aloha Airlines ba amex flight 243 suffered major structural damage to its pressurized fuselage with 18-foot section of upper fuselage separated.
  •  Alarmed FAA required roll out of a program just online mba programs  to preclude WFD into the FAA-approved maintenance or inspection program of each operator of large transport category airplanes.
  •  The rule required a limit of validity-LOV (in FC/FH) of the structural maintenance program, where additional inspections/ modification/replacements must be incorporated into the operator's maintenance programs in order to allow continued operation on or beyond design and gravit service goal.

 Sources of WFD are:

  • Multiple site damage (MSD) is a source of WFD known by the simultaneous presence of fatigue cracks in the same element .
  •  Multiple element damage (MED) is a source of WFD Known by the simultaneous presence of fatigue cracks in similar adjacent chcl3 lewis structure elements.

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