The U.S. aviation giant has said it is willing to expand its manufacturing network in Vietnam, where it already has seven "sub-tier" suppliers - companies that sell components to its direct suppliers.

In September, Boeing also reached a preliminary deal with flag carrier Vietnam Airlines for the sale of 50 Boeing 737 Max 8 jets.

KP Aero will be formally granted later this week the authorisation to invest $20 million in Vietnam, authorities in the central city of Danang said in media statement on Wednesday.

A Vietnamese official said the investment will be in the city's high-tech industrial park.

KP Aero did not respond to a request for comment.

KP Aero is a supplier of parts to Korean Air's engineering division, which is in turn a direct supplier to Boeing.

Boeing declined to comment.

(Reporting by Francesco Guarascio; editing by Miral Fahmy)