ST90, ST70, ST100, ST60, U57, SQ51, NOR741RIT, BRU65, T66, TK42, LAD19, RES97, RES27, ENG73, EN103, ENG43, ENG33, ENG63, M6, MICU120: N ACADEMY AVE, MAHONING TWP: ELEVATOR SMOKE DETECTOR ACTIVATION. BUILDING MAINTENANCE REQUESTED CREWS TO CANCEL DUE TO FALSE ALARM.