Changes to Boeing’s safety culture will take years but the company has made helpful shifts in the short-term, the FAA administrator told lawmakers.

Boeing must do more to improve the aircraft safety following a door plug blowout in January and other mishaps, Federal Aviation Administration Administrator Mike Whitaker told a House committee Tuesday.

The head of the Federal Aviation Administration told a U.S. House subcommittee on Tuesday that safety culture improvements at Boeing may take three to five years to complete. "It is not a six-month program - it is a three-year to five-year program,