A Hong Kong–London Cathay Pacific A350 briefly went dark over Romanian airspace, triggering a NATO quick‑reaction alert and Hungarian Gripen intercepts. With over 300 passengers on board and ownership links to Air China, this video breaks down the CX257 comms mystery, alliance vigilance, and why Beijing now looms as a growing NATO concern.

Cathay Pacific investigating failure by flight to check in over Romanian airspace at one stage on Saturday.

City’s flag carrier also says safety of aircraft or people on board was not compromised at any point.

City’s flag carrier says London-bound flight temporarily lost communication with local air traffic control, but was never in danger.

The Hong Kong-to-London flight lost contact with Romanian controllers, prompting Hungarian jets to issue a visual warning under NATO interception procedures

A Hong Kong–London Cathay Pacific A350 briefly went dark over Romanian airspace, triggering a NATO quick‑reaction alert and Hungarian Gripen intercepts. With over 300 passengers…

Flight CX257 from Hong Kong to London experienced a “temporary loss of communication” with local air traffic control over Romanian airspace on Jul 4.