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A Model for the Effect of Time Between Overhauls on Engine System Reliability, Availability, and Operational Cost
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English
Abstract
A mathematical model has been developed and computerized that provides aerospace engineers and managers direct, accurate knowledge of how designated time between overhauls (TBO) affects the reliability, availability, and operational cost of an engine system. The model's inputs include: the Weibull parameters of the components making up the system; the average active repair time required to restore the system to its initial condition; and average cost estimates for engine overhaul. The final result is a set of curves: one depicts mean time between failure versus TBO; another depicts engine availability versus TBO; and a third depicts maintenance cost per operating hour versus TBO. From these curves the optimal TBO can be determined. Specific examples are presented.
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Citation
Redman, J., "A Model for the Effect of Time Between Overhauls on Engine System Reliability, Availability, and Operational Cost," SAE Technical Paper 861666, 1986, https://doi.org/10.4271/861666.Also In
References
- Redman J. Mitchell R. “Engine System Field Experience Simulation Program,” Technical Paper No. 841601 Society of Automotive Engineers, Inc. 1985
- Bozovsky I. “Reliability Theory and Practice,” Prentice Hall 1962
- Weibull W. “A statistical Representation of Fatigue Failures in Solids,” Royal Institute of Technology Stockholm November 1954
- Bazovsky I. MacFarlane N.R. Wunderman R.L. “Study of Maintenance Cost Optimization and Reliability of Shipboard Machinery,” United Control Corporation Seattle, Washington DDC No. AD 283428 June 1962