This SAE Aerospace Information Report (AIR) contains Lessons Learned from aerospace actuation, control and fluid power systems technologies. The lessons were prepared by engineers from the aerospace industry and government services as part of the work of SAE Committee A-6, Aerospace Actuation, Control and Fluid Power Systems. Each lesson was presented to the appropriate A-6 technical panel. The technical topics are organized into five sections covering systems, actuation, hydraulic components, electrical components and miscellaneous, each further divided into subsections. The information topics are presented in a concise format of Problem, Issue, Solution and Lesson Learned, often with accompanying descriptive diagrams and illustrations for clarity and understanding.

Further Comment on Document AIR4543 and This Document AIR4543/1

AIR4543B contains lessons learned presented to the A-6 Committee during meetings held from 1989 through 1999. This AIR4543/1 document contains lessons presented during the period 2000 through 2010. Subsequent AIR4543/X documents will similarly contain material segregated by the date of presentation.

The structure of the numbering of the technical topics contained within section 3 of each document will be maintained constant and each new lesson in each new AIR will be numbered consecutively from the material contained in earlier documents.

To help the reader navigate the material, a complete index of all lessons published up until the closing date of this new AIR is included as Appendix A. Each subsequent AIR will similarly contain an updated complete index of all published lessons.

NOTES:

1. Where known, the year of the activity described in each lesson is provided.

2. The allocation of the lessons to the various categories is typically obvious, because of their focused content, but occasionally arbitrary because of mixed content. Text searches are suggested to ensure that all lessons of interest are found.