Thirty engineers from Indonesia taking part in a joint fighter jet development project will fly to South Korea later Friday.

The project dubbed KF-21 appears to be on the move again after a year and a half. In March last year, Indonesia recalled over a hundred of its engineers who were working in South Korea, citing the pandemic.

According to the Defense Acquisition Program Administration and the South Korean Embassy in Jakarta, 33 technical experts involved in the program recently applied for and received visas this month.

Three have been excluded for now for health reasons, but the remaining 30 are headed to South Korea. The defense program administration said the Indonesian workforce will increase to around 100 by the year's end.

Indonesia agreed to partner in Seoul's initiative to develop a four-point-five generation fighter jet and fund 20 percent of the eight-point-eight trillion won cost. 

But it has failed to make payments since 2017, citing economic constraints.