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Improving the Continued Airworthiness of Civil Aircraft A Strategy for the FAA's Aircraft Certification Service (1998) / Chapter Skim
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Appendix E: Probability and Reliability Analysis
Pages 69-72

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From page 69...
... ) FAULT TREE ANALYSIS Fault tree analysis is an engineering tool that, among other things, can help assess probabilities of the occurrence of undesirable events.
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From page 70...
... . ·(3 ·: system fails 1 ~ -1 ~ ~ } Top Event "and" Gate (I)
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From page 71...
... EXAMPLE INCORPORATING DEPENDENT FAI LU RES Consider a twin engine aircraft. To calculate the probability that both engines will fail by the time the aircraft accumulates some number of operating hours, I, it is necessary to develop a probability model.
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From page 72...
... A model for IMPROVING THE CONTINUED AIRWORTHINESS OF CIVIL AIRCRAFT common mode failures can be created via a new parameter \*
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Key Terms

  • top event
  • risk analysis
  • mode failures
  • common mode
  • tree analysis

  • assuming independence
  • undesirable event
  • exponential distribution
  • false sense
  • failure rate

  • sophisticated reliability
  • relative frequency
  • reliability analysis
  • gate underestimates
  • independence properly

  • block diagrams
  • engine failure
  • example incorporating
  • simple model
  • wherein mathematical

  • gate overestimates
  • expert judgment
  • analysis wherein
  • engineering tool
  • assess probabilities

  • including risk
  • help assess
  • continued airworthiness
  • analysis procedures
  • undesirable events


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