United Flight UA2174 Squawks 7500 as Passenger Tries to Storm Cockpit, Claims Bomb in Backpack; Lands Safely in New Orleans
Why It MattersCockpit-breach attempts test crew procedures and transponder alerting on ordinary scheduled flights, and a run of threat incidents on one carrier's narrowbody fleet keeps pressure on in-flight security protocols.
What happened
A male passenger attempted to storm the cockpit of United Airlines flight UA2174 on Monday, November 9. The aircraft was a Boeing 737 MAX 9, registration N17422, flying from Newark to New Orleans. Flight tracking data shows it departed Newark at 9:26 PM and touched down in New Orleans at 11:07 PM.
The pilots squawked 7500, the transponder code for hijacking or unlawful interference, to alert air traffic control. The code was first squawked as the jet descended through 20,000 feet. The pilots later said the passenger was carrying a backpack that he stated contained a bomb.
In an ACARS message to other United aircraft, the crew wrote: "We had an attempted level four, no other details are known at this time." A Level 4 threat is the most severe level, indicating an attempted or actual breach of the cockpit. The flight landed safely.
By the time the aircraft reached its gate in New Orleans, the passenger was at the back of the aircraft, sitting with cabin crew. Few other details are known, and police were likely waiting for him. Simple Flying has asked United Airlines for further information.
The previous month's United incident
The incident follows another United event the previous month. A Boeing 737 MAX 8 flying from Las Vegas to Newark returned to Harry Reid International Airport (LAS) after a flight attendant spotted a passenger sending texts about hijacking the plane.
According to People, the 25-year-old passenger was under the influence of alcohol and was arrested for making false terrorism threats.
Industry impact & what to watch
Squawk codes are four-digit transponder settings that tell air traffic control an aircraft's status. 7700 signals a general emergency needing priority handling, while 7500 indicates hijacking or unlawful interference and lets pilots alert controllers non-verbally, without hijackers knowing. Here the code went out during the descent, so controllers had the alert before the aircraft reached the ground.
Two threat-related events on United 737 MAX aircraft within roughly a month, plus the flydubai FZ1073 case earlier this year, where both 7700 and 7500 were issued on a Dubai–Tel Aviv flight, show how often crews now have to run the unlawful-interference procedure on routine scheduled services. The outcome in each case depends on the same chain: cabin crew spotting the behaviour, the flight deck securing itself, and the code and ACARS message reaching the ground and other aircraft.
The next fixed point is United's response to Simple Flying's request for further information, which would show how the passenger was restrained and what happened to the backpack after landing.
