Overview

• Delta flight DL59 from London to Boston, operated by an Airbus A330-900neo registered N411DX, turned back on October 5 after the crew reported fumes in the cockpit.
• The jet landed safely at Heathrow about 95 minutes after departure, was met by fire and rescue, cleared after inspection, and passengers were bused to the terminal.
• Delta said the affected service would operate the next day and that its customer team was assisting with accommodations and rebooking.
• Tracking showed the aircraft was later ferried empty to Boston as DL9909.
• No cause has been announced, and the event comes days after reporting on Delta’s program to replace APUs on some A320s, with no link established to this incident.