UA 90 EWR-TLV 9/20 scheduled 22:50 currently after every half hour pushing off its 9/21 02:30 hrs initially they said its a computer glitch then it became a PA system malfunction and UA was waiting for FAA waiver to fly without PA finally @ 02:15 we boarded and PA is working !!! now that we are 1 hour on board just got notification push back @ 03:15😴