Appendix J - Reliability Centered Maintenance.pdf

Appendix J

1.0 Reliability Centered Maintenance (RCM)

Reliability Centered Maintenance (RCM) is the process that is used to determine the most effective approach to equipment maintenance. RCM involves identifying actions that, when taken, will reduce the probability of equipment failure and which are the most cost effective. RCM includes the entire life cycle of the equipment starting with the equipment design, manufacturing/ construction and installation. RCM seeks the optimal mix of Condition-Based Actions, other Time or Cycle-Based actions, or a Run-to-Failure approach. The ultimate goal of RCM is to minimize maintenance and operational costs. This appendix is a condensed version of RCM related topics with a focus on predictive maintenance, acceptance testing utilizing predictive and/or proactive technologies, resulting in the creation of baseline data for each equipment asset and hopefully a more reliable piece of equipment.

1.1 RCM Acceptance Testing with Baseline Data

Baseline data is condition monitoring information that is representative of equipment in a new and/or properly operating condition. The baseline data is the foundation of the predictive trending analysis required to forecast equipment condition. It is important that this data is established as early as possible in the life of the equipment. The baseline readings and periodic monitoring data should be taken and recorded under the same conditions ( or as close as can be achieved), and will be used for acceptance testing. The Equipment Engineering Flight organization, 76 MXSS/MXDEA, will provide acceptance testing of equipment components using advanced technology listed in section

1.2. Final acceptance of the equipment will include a signature by the RCM Engineering Team Lead verifying equipment reliability; see section 1.5 of Appendix B. When the equipment has been accepted by the Government, the final data obtained will be used to establish the original installed equipment health baseline data for this equipment or system.

1.2 Criteria by Technology

1.2.1 Vibration Monitoring

The development of specific vibration criteria for every machine for all possible operating speeds, in all applications, and in every mounting arrangement, is very difficult. Vibration amplitude varies with operating speed, load, and mounting arrangement, so developing criteria based solely on amplitude can be misleading. The frequency content of the spectrum is often as important as the amplitude. For example, the presence of a frequency associated with an inner race defect on a new bearing is unacceptable, regardless of the amplitude.

Therefore; the vibration specifications utilized for acceptance testing will be based on generic

International Standards Organization (ISO) 3945, ISO I 0816, American National Standards Institute

(ANSI), MIL-STD-167-1, MlLSTD740-2 (Appendix C) and Lockheed Martin vibration