Title :
Method for investigating repair/refurbishment effectiveness
Author :
Powell, Mark A. ; Millar, Richard C.
Author_Institution :
Attwater Consulting, Webster, TX, USA
Abstract :
Aerospace systems that fail in service are often repaired or refurbished and returned to service. Repair/refurbishment may return the system to the equivalent of new condition, to some state less than new condition, or perhaps even to a better than new condition. Respectively, repair/refurbishment may have no effect on future reliability, degrade future reliability, or improve it. Depending on which reliability state the post-failure repair/refurbishment produces for the system, preventative maintenance schemes can differ dramatically. For example, should the repair/refurbishment return the system to a less than new condition with each subsequent failure, shorter preventative maintenance intervals as a function of number of the maintenance cycles increase overall availability and cost effectiveness. Should the repair/refurbishment return the system to a better than new condition, longer preventative maintenance intervals as a function of number of maintenance cycles increase overall availability and cost effectiveness.
Keywords :
aerospace engines; failure (mechanical); gas turbines; maintenance engineering; reliability; F/A-18 E/F Super Hornet; US navy; aerospace systems; corrective maintenance plans; general electric F414 low bypass gas turbine engine; maintenance cycles; post-failure repair/refurbishment produces; preventative maintenance; reliability; repair-refurbishment effectiveness; Data models; Engines; Equations; Maintenance engineering; Mathematical model; Reliability; Uncertainty;
Conference_Titel :
Aerospace Conference, 2011 IEEE
Conference_Location :
Big Sky, MT
Print_ISBN :
978-1-4244-7350-2
DOI :
10.1109/AERO.2011.5747582