Foreign Secretary Antony Blinken switched planes in Zurich, Switzerland, on Wednesday after his original plane landed.
He first boarded a Boeing C-40, part of the US military service, but the plane suffered a critical failure related to an oxygen leak.
A new flight to Blingen was arranged. As journalists could not be accommodated on the new flight, the accompanying press team was advised to make commercial flight arrangements.
Blinken was in Davos this week to attend the World Economic Forum, a summit of government and business leaders.
The Boeing C-40 is a modified Boeing 737 used for the trips of the Vice President, First Lady, or Secretary of State.
Boeing has been at the center of much controversy and scrutiny since an Alaska Airlines plane's door plug disconnected in mid-air, temporarily prompting the Federal Aviation Administration. Ground Boeing 737 Max 9 aircraft Operated in or by US airlines.
The FAA expanded its investigation into Boeing on Wednesday, saying it would pay special attention to Spirit Aerosystems, a Wichita, Kansas, aerospace company that makes and installs plug doors. Boeing 737 max 9 flights.
