sydney etihad airways flight travel abu dhabi sydney make emergency land australia adelaide airport early saturday warn indicator activate cockpit crew board etihad flight ey450 land plane a.m. 1830 gmt adelaide airport state south australia boeing 777 passenger jet 349 passengers board disembark via emergency exit accord online news service adelaide advertiser technical fault cargo hold air recirculation fan find etihad airways tell reuters email etihad airways apologize inconvenience safety guests crew paramount importance say australia abc news report smoke alarm activate passengers would make onward journey via airlines due crew rest requirements airline say saturday etihad flight ey451 sydney abu dhabi cancel passengers would reschedule late etihad service sydney airline say second incident year etihad flight connect australia big city hub abu dhabi passengers transit worldwide destinations july four men arrest sydney islamist plot attack flight one men send unsuspecting brother catch july 15 sydney abu dhabi flight carry bomb hide meat-mincer etihad flight abu dhabi make emergency land australia