WASHINGTON

The US State Department on Thursday approved the potential sale of up to 36 F-15 fighter jets and related equipment to Indonesia for an estimated cost of $13.9 billion. 

The equipment includes engines, radars, warning systems, cueing systems, navigation security systems and training pods, said the Defense Security Cooperation Agency in a statement.

"The proposed sale will improve Indonesia’s capability to meet current and future threats by enabling it to provide increased deterrence and air defense coverage across a very complex air and maritime domain," said the statement.

The agency delivered the required certification notifying Congress of the possible sale Thursday.

"The proposed sale of this equipment and support will not alter the basic military balance in the region," said the statement.