Turbine Aircraft Engine Operational Trending and JT8D Static Component Reliability Study.

摘要

The engine subpanel of the June 1988 International Conference on Aging Airplanes identified the need to study aircraft turbine engine static components for reliability problems resulting from aging effects. This study trended in-flight shutdowns and unscheduled removal rates of JT8D, CF6, and JT3D turbine aircraft engines for the two year period of February 1988 through January 1990. Specific engine components on the JT8D engines of air carriers frequently exceeding the industry norm during the trending period were identified. This review resulted in the following types of component failures occurring: hard failures, wear and tear/inspection failures, structural failures, diagnostic troubleshooting, and maintenance errors. In addition to specific JT8D engine components being identified, an ultrasonic inspection procedure was developed for the JT8D engine outer combustor case boss.