TOKYO - Mitsubishi Heavy Industries Ltd and IHI Corp said on Friday they were discussing joint production of aircraft engine parts. The announcement followed a Yomiuri daily report that the two planned to jointly invest in setting up a new company this year in the aircraft engine business and that the government was considering offering support to the operation. Mitsubishi Heavy and IHI said in a joint statement that the report was not based on information released by the companies and that no decision had been made regarding what form any joint production might take.