45 of 50 Dreamliners Fixed
This is the first of six United Dreamliners to be retrofitted with a new battery system.
It includes greater space between battery cells to prevent them from catching fire. If the re-designed battery does catch on fire, it is now encased in steel box to prevent the fire from spreading.
There is also ventilation leading from the steel box to outside the Dreamliner so any smoke from a fire goes outside the 787 and not into the cabin.
"The battery system so far has been squawk free," said Boeing CEO McNerney. "I think we have normal teething problems that are consistent with new airplanes."
(Read More: Boeing CEO Sees Little Dreamliner Fallout)
As McNerney sat in his seat handling questions from reporters, passengers on the flight stopped by to congratulate him for getting the Dreamliner back in service.
Boeing is currently building seven Dreamliners per month and plans to deliver at least sixty this year. As Boeing shares have soared in the last two months some have speculated Boeing may deliver more than sixty 787s this year.
For now, McNerney isn't changing his guidance, "The production system is working well, we kept it going throughout the battery fix," said McNerney. "It is nice to have analysts conjure up upside as they look at our company, we love it."