NDLI: Risk based maintenance deferral for components subject to hidden failure

Content Provider	IEEE Xplore Digital Library
Author	Ahmadi, A. Block, J.M. Kumar, U.
Copyright Year	2012
Description	Author affiliation: Lulea University of Technology (LTU), Division of Operation and Maintenance Eng. SE-97187, Luleå-Sweden (Ahmadi, A.) \|\| Lulea University of Technology, Division of Operation and Maintenance Eng. SE-97187, Luleå-Sweden (Kumar, U.) \|\| Saab Aerotech, Ground Support Services, SE-582 81, Linköping, Sweden (Block, J.M.)
Abstract	In the aviation industry, it may be necessary to employ a combination of Failure Finding Inspection (FFI) and a scheduled discard task at a specific threshold, when a component is aging and its failures are hidden and exert a “safety effect”. This is to ensure an adequate level of availability of hidden functions, and to reduce the risk of multiple failures to an acceptable level. However, in some situations, operators prefer to extend the discard life of components beyond their recommended life limit, due to operational needs or logistic issues. This necessitates the definition of an optimal Failure Finding Inspection interval for the extended life period. The main purpose of this paper is to develop analytical and graphical methodologies to identify the optimal FFI interval for extension of the discard life of aircraft components. The paper considers repairable components which are periodically tested. The methodology assumes that the inspection and repair actions lead to as-bad-as-old (ABAO) reliability characteristics. The graphical approach proposed in this paper considers inspection and repair times, as well as the costs associated with accidents, inspection, and repair, and it takes into account the opportunity losses due to the maintenance downtime. The analytical approach for calculating the unavailability of the hidden function is based on the Mean Fractional Dead Time (MFDT).
Starting Page	1
Ending Page	7
File Size	1118841
Page Count	7
File Format	PDF
ISBN	9781457718496
ISSN	0149144X
e-ISBN	9781457718519
DOI	10.1109/RAMS.2012.6175483
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-01-23
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Inspection Maintenance engineering Safety Aging Availability Aircraft Risk Cost function Failure Finding Inspection Hidden failures Inspection interval optimization
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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