ADS-79D-HDBK Downloaded from https://www.everyspec.com Seeded/Natural Fault Test Validation: This is a viable option for prognostics validation. To start off, validation tests need to be designed by the supplier and the tests need to be approved by the program manager. These tests can be either a seeded fault test or a natural fault test, as explained in Section K.5.1.2. Once the test methodology is determined and the tests approved, the validation may begin. The validation process also has two options: Bench Test or On-Aircraft Test.
For more information on these two types of test, refer to Appendix J of ADS-79D, ―Seeded Fault Testing.‖ A document about the validation process will have to be generated to close out the process. K.5.3 Structural Usage Monitoring Credit V&V Process. Structural Usage Monitoring can provide Maintenance Credits in many forms including updating design usage spectra, satisfying structural integrity monitoring requirements, providing lifing options such as life factors for isolated sections of the fleet with unique missions, or providing for individual component fatigue life tracking.
Structural usage monitoring can be accomplished using regime recognition algorithms that quantify usage in terms of structurally significant regimes or by direct loads monitoring The achievable benefits or Maintenance Credits from usage monitoring are dependent on the availability of aircraft data parameters and the availability and quantity of data available across the fleet. This concept is shown notionally in Figure K-10. In the figure, the vertical axis FIGURE K-10 Influence of data parameter coverage and data sampling coverage on achievable usage monitoring credits. 210