Welcome to the forum. As far as I know Air Bags are always deflated before operating the jacks. Some experts will come along on this but to my thinking the Air bags will gradually bleed off thereby puting more stress on the jacks if you try to use them before deflating. I think it is standard prodedure to deflate. At least in my MH I have to deflate or risk damaging the jacks per instructions.
98 Endeavor DP, ISB275
RX300, Falcon II hitch, BB Vantage Select
VMSpc, 2002 Grey Ford Powerstroke
TST 507 w/ 10 Sensors