The Ageing Management Plans of Nabla will address in detail, component per component, the fatigue accumulation to reach the life extension target. This AMP comes as a result of:

• the results of the Practical Assessment and Inspections.
• the results of Life Expectancy of the component.
• expected failure rate and associated Costs in the Reliability Model.
• Maintenance FMECA.

AMPs consists of several tasks:

• FEM - Finite Element Modeling.
• FEA - Finite Element Analysis.
• Damage Tolerance Analysis:
  • Critical crack length (both elastic and plastic checks).
  • Crack Propagation Pattern.
  • Leading to the build-up of the risk evaluation criteria for cracks, determining, given a certain crack. and its length, how this crack will propagate and when will it become critical.
• Adaptation of Maintenance Protocols:
  • Specific inspections and test to be done.
  • Inspections Frequency.
• Detail definition of the reinforcements.