United Airlines is keeping its fleet of Boeing 787 Dreamliners on the ground until mid-May at the earliest as investigators try to figure out what caused a battery fire and another battery problem on the model last month.
United said flights from Denver to Tokyo's Narita airport that were supposed to start March 31 will be postponed at least until May 12, and will not proceed until the 787 is ready. On all other United routes, no 787 will fly until June 5, the airline said Thursday,
United spokeswoman Christen David said the plane could still fly earlier than that if a fix is found. At that point, it would be used as needed around United's system.
The 50 existing 787s have been grounded since Jan. 16.