Kusumawardana, N. S., & Nusraningrum, D. (2021). 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, 4(1), 23–32. https://doi.org/10.22441/ihasj.2021.v4i1.03