Accession Number:

ADA014368

Title:

Integrated Aerospace Engine Management. Foundations in Estimation and Prediction of Engine Removals

Descriptive Note:

Final rept. 15 May-22 Aug 1974

Corporate Author:

TECHNOLOGY INC DAYTON OH

Personal Author(s):

Report Date:

1975-06-01

Pagination or Media Count:

72.0

Abstract:

Aerospace engine management is an exceedingly complicated problem with important consequences. Analytical management techniques may have potential application in a future, integrated engine management system. Fundamental to any such system is information about engine lives and the number of engine replacements required to meet flying hour program requirements. In this report, the engine management problem is described in the context of a production system producing flying hours. This perspective shows the necessity for engine life information since the engines produce flying hours. The maximum likelihood estimator of a multi-risk engine life cumulative distribution function with inspections has been derived. It may be an improvement over the actuarial method now used, and information about usage removals and inspection removals is also available from the maximum likelihood estimator. An hierarchical sequence of families of distributions has been constructed for ease of sequential likelihood ratio testing for more information about the engine life distributions.

Subject Categories:

  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE