There are actually 3 blocks holding down the NLG. Using concrete blocks is an option vs. having a heavy aircraft loaded with fuel. Using a axle jack is a quick way to spin the tires without jacking the entire aircraft.
737-800 COPA Airlines.
When I received my A&P it was two years before I was able to land a job in aviation. Most Employers told me the A&P is just a license to learn. Good luck and you will get there.
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