A US-bound flight from Sydney turned back on Tuesday after a note found on board raised fears of a bomb threat, Australia’s government said. Flight UAL840, carrying 246 passengers and bound for Los Angeles, landed safely back in Sydney airport nearly three hours after take-off. Okay, that’s interesting. I looked up the flight information in SABRE for this flight, and it’s described as a crew issue. ¤QUA/2840/27JUL« UA RESPONSE F:UA840/27JUL MEL/2029CT/OFF 1129A .14E SYD/0503CT/IN 550P 5.00L ‡DPTS CNCLD LAX/0504CT/ARVS CNCLD ‡ETD 100P OT JFK/0504CT/ETA 927P OT SYD/WAS OFF SYD 257P - RETURNED TO FIELD DUE TO CREW SYDLAX/PSGR PROT -…