The State Department approved a possible $675 million Foreign Military Sale (FMS) to South Korea for follow-on support and services for F-35 Joint Strike Fighter aircraft, engines, weapons, and other equipment.

The Defense Security Cooperation Agency (DSCA) notified Congress of the approval on Friday.

The first Republic of Korea F-35A makes its public debut in a special ceremony at Lockheed Martin in Fort Worth, Texas, March 28, 2018. (Photo: Lockheed Martin)

South Korea’s request covers follow-on support and services for its F-35 aircraft, engines, and weapons; publications and technical documentation; support equipment; spare and repair parts; repair and return; test equipment; software delivery and support; pilot flight equipment; personnel training equipment; and other related U.S. government and contractor logistical and technical support.

The primary contractor for the FMS is primary F-35 manufacturer Lockheed Martin [LMT], and engine builder Pratt and Whitney, a subsidiary of Raytheon Technologies [RTX].

DSCA said the sale would sustain South Korea’s flight and maintenance activity, improving sustainability and continue support for its F-35 fleet.

The agency noted the sale helps support the security and defense needs of one of the closest allies of the U.S. in the Indo-Pacific Command theater.

Implementation of the sale would require 14-26 more U.S. contractor representatives being assigned to South Korea.