The Federal Aviation Administration on Friday said it was proposing to fine Boeing's commercial airplane division $2.75 million for failing to take prompt action to fix a problem with fasteners discovered in 2008 on its model 777 airlines.

"Safety is our top priority and a robust quality control system is a vital part of maintaining the world's safest air transportation system," U.S. Transportation Secretary Anthony Foxx said in a statement announcing the action.

"Airplane manufacturers must take prompt and thorough steps to correct safety and compliance problems once they become aware of them," Foxx added.

(Reporting by Doug Palmer)