Blog 3.2: Aircraft Systems and Flight

 Hydraulic System


    In this blog, I will be discussing the importance of the hydraulic system in aircraft. In my opinion, the hydraulic system is arguably the most important system on any aircraft. There are a variety of functions that are driven by hydraulics. Some of these functions include: braking, landing gear deployment/retraction, and flight controls such as operating flaps and spoilers (PHAK, 2016).

    One of the most common failures in the hydraulic system is a leak. A leak in the hydraulic line could lead to low pressure in the system. If this event occurs, lets say in the braking system, it could be a lethal situation on the ground given the speed at which aircraft travel during a landing. Among other things, over servicing hydraulic systems or allowing contaminants to enter during service could also lead to failure. Failure of these particular components and unreliable operation of hydraulic systems is often caused by inadequate contamination control, which should also be incorporated during the system design process (Chapple, P., 2015). 
    

    In order to mitigate any hydraulic system mishaps, I believe that most key tool to use and practice is Operational Risk Management (ORM). ORM is a decision-making process that identifies the operational risk and benefit to help determine the best avenue to take for just about any situation (SSH, 2000). Ensuring that ORM is in place before every system service, pre/during/post flight inspections and during routine maintenance is critical. There are technical manuals in place that should be followed no matter what. It does not matter how knowledgeable you THINK you are, its about doing the right thing and having a by-the-book attitude. Proper handling procedures are often outlined in servicing instructions, to include: proper way to shut down hydraulic systems prior to opening, how to ensure pockets of air do not enter the lines, and testing of the system after service to ensure it functioning properly.


References:

Federal Aviation Administration. “Pilot’s Handbook of Aeronautical Knowledge (PHAK),” 2016. Retrieved https://www.faa.gov/regulations_policies/handbooks_manuals/ aviation/phak/  

Chapple, P. (2015). Principles of hydraulic systems design  (Second edition.). Momentum Press. ProQuest Ebook Central - Reader (erau.edu)


FAA System Safety Handbook, Chapter 15: Operational Risk Management, Retrieved on December 05, 2020. Chap15_1200.PDF (faa.gov) 

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