Updated:EVERETT, Wash. —
Boeing conducted a 787 battery certification demonstration flight Friday.
The flight was on Line number 86, a Boeing-owned production airplane built for LOT Polish Airlines.
The flight took off shortly before 11 a.m. and landed shortly before 12:30 p.m. at Paine Field.
The 787 Dreamliner has been grounded since mid-January because of smoldering batteries. Boeing has designed what it says is a fix for the problem. Air and ground tests will wrap up with the flight on Friday.
The fix will still need approval by the Federal Aviation Administration and other authorities before airlines can fly 787s again.