The US has opened a new inquiry into troubled jet firm Boeing, after the company told air safety regulators that it might not have properly inspected its 787 Dreamliner planes.

The Federal Aviation Administration (FAA) said it would look into whether staff had falsified records.

It said Boeing was re-inspecting all 787 jets on the manufacturing line.

Boeing will be forced to develop an “action plan” to address concerns about planes already in service, it added.

Boeing did not comment.

Internally, the company told staff last week that the “misconduct” had not created an “immediate safety of flight issue”, according to a message seen by BBC News.

“We quickly reviewed the matter and learned that several people had been violating company policies by not performing a required test, but recording the work as having been completed,” Scott Stocker, head of the Boeing 787 program, said in the email to staff.