Question regarding jacking?

pre jacking , verify your fuel load is not over max, verify all air mode breakers are pulled such as pitot heat or just disconnect ground shift. Verify the jack is correct jack and serviceable. Verify nothing has been removed from the or on the a/c that will change center of gravity. Disconnect power cord. A stuck jack you will find out real quick . A chattering jack you risk the a/c bouncing off the jacks. You can jack unevenly to a certain degree. Past that certain degree you risk the a/c might slide off the jacks. Seen it happen and it ain`t nice