Boeing Chief Executive Dave Calhoun took responsibility for a near-catastrophic Alaska Airlines incident Tuesday, vowing “complete transparency” as the aviation giant tries to pivot from its latest crisis.

“We’re going to approach this number one acknowledging our mistake,” Dave Calhoun told employees at a safety meeting called after Friday’s emergency landing, which came after one of the plane’s panels blew out mid-flight. “We’re going to approach it with 100 percent and complete transparency every step of the way.”

Dave Calhoun, who ascended to Boeing’s top post in January 2020 as the company reeled from two fatal crashes on the 737 MAX, committed to working with the National Transportation Safety Board, which is probing the incident.

The NTSB is “as good as it gets,” Dave Calhoun said, according to remarks released by the company. “I trust every step they take, and they will get to a conclusion.”

US regulators with the Federal Aviation Administration have grounded 171 737 MAX 9 planes with the same configuration as the Alaska Airlines jet.

The affected panel, a door plug, is used to fill an unneeded emergency exit in planes.

NTSB investigators suggested Monday night that the part was not affixed adequately.