ScienceHow Aviation Emergency Codes 7500, 7600, and 7700 Work
Pilots use specific four-digit transponder codes to silently alert air traffic control about emergencies without explaining over radio. Code 7500 signals unlawful interference or hijacking, 7600 indicates radio communication failure, and 7700 denotes a general emergency. For example, flydubai flight FZ1073 switched from code 7700 to 7500 during a flight from Dubai to Tel Aviv, signaling a hijacking situation.
News18 World·3h ago

