Kusumawardana, Nofian Sudi, and Dewi Nusraningrum. “STUDY OF MAINTENANCE OF UPS EQUIPMENT (UNINTERUPTABLE POWER SUPPLY) WITH FAULT TREE ANALYSIS (FTA) METHOD TO PRODUCE TIMELY POWER SUPPLY AVAILABILITY AT SOEKARNO-HATTA AIRPORT”. International Humanities and Applied Science Journal, vol. 4, no. 1, Sept. 2021, pp. 23-32, doi:10.22441/ihasj.2021.v4i1.03.