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Probability of Detection (POD) Analysis for the Advanced Retirement for Cause (RFC)/Engine Structural Integrity Program (ENSIP) Nondestructive Evaluation (NDE) System-Volume 3: Material Correlation Study

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Final rept. 29 Sep 1995-31 Dec 1999

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This is the third volume of a technical report prepared by the University of Dayton Research Institute for the Materials and Manufacturing Directorate ML of the Air Force Research Laboratory AFRL, Wright-Patterson Air Force Base, Ohio. The final report of this work comprises three volumes. Volume 1 presents a description of changes made to the probability of detection POD analysis program of Mil-STD-1823 and the statistical evaluation of modifications that were made to version 3 of the Eddy Current Inspection System ECIS v3. Volume 2 contains the Users Manual for the version 3 update of the POD program. The results of a separate study for predicting POD from specimens of like geometry and materials are presented in Volume 3. In the current environment of restricted budgets, aircraft components are often used beyond their design life. In order to avoid the large cost of replacing critical rotating parts as they reach their safe-life limits, a Retirement For Cause RCF program was implemented. The RFC program involves periodic nondestructive evaluation NDF inspections to assess the damage-state of components. Components with no detectable cracks are returned to service and those with detected cracks are discarded before they can cause an incident. This process allows parts with high life to be used to their full potential. The Air Force has embraced RFC and currently uses it to successfully manage component life for several of their gas turbine engines.

Subject Categories:

  • Magnetic and Electric Field Detection and Detectors
  • Jet and Gas Turbine Engines

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