Delta Flight DL275, a transpacific route from Detroit Metropolitan Wayne County Airport (DTW) to Tokyo Haneda Airport (HND), was diverted to Los Angeles International Airport (LAX) on May 27, 2025, due to a malfunction in the aircraft’s engine anti-ice system. The Airbus A350-900, tail number N508DN, was approximately 620 nautical miles southwest of Anchorage, Alaska, when the issue was detected. The flight crew, prioritizing safety, decided to reroute to LAX, a major Delta hub equipped with the necessary maintenance facilities.
The anti-ice system is crucial for preventing ice buildup on engine components during high-altitude flights over cold regions. A failure in this system posed potential risks, including engine performance issues. Despite both engines remaining fully functional, the crew opted for a precautionary landing to ensure passenger safety.
The aircraft landed safely at LAX approximately 5.5 hours after the diversion decision was made. Upon landing, the aircraft underwent a thorough inspection by Delta’s maintenance team, and the anti-ice system issue was identified and addressed. The aircraft remained grounded for approximately 18.5 hours before returning to operational status.
The diversion incurred significant costs for Delta Air Lines, estimated at $2.3 million. These expenses included fuel costs, landing fees, maintenance and inspection, passenger rerouting, accommodation and meals, and revenue loss from the canceled Tokyo segment.
Passengers on board reported no injuries or significant disturbances during the diversion. Delta provided meal vouchers, hotel accommodations, and rebooking options for affected passengers. Most passengers expressed relief at the crew’s transparency and professionalism.
This incident underscores the importance of engine anti-ice systems in ensuring the safety of long-haul flights over cold regions. It also highlights the effectiveness of flight crews in making swift and informed decisions to prioritize passenger safety. Delta’s prompt response and the availability of maintenance facilities at LAX contributed to the successful resolution of the situation.