(File photo: Xinhua)

Scandinavian airline SAS said Tuesday it has filed for so-called Chapter 11 bankruptcy proceedings in the United States, as a part of a restructuring plan, a day after pilots walked out on strike.

In order "to proceed with the implementation of key elements of (its business transformation plan), SAS and certain of its subsidiaries have voluntarily filed for Chapter 11" in the US, which allows a company to restructure its debts under court supervision, the troubled carrier said in a statement.