MCDONNELL DOUGLAS <MD> NOT APPROACHED BY PESCH McDonnell Douglas Corp, which has a five mln dlr investment in Republic Health Corp <REPH>, said it has not been approached to sell its shares in Republic Health. Earlier, Alpha Health Systems Corp, a unit of Pesch and Co, said it submitted a merger proposal to the board of REPH Acquisition Co, the parent of Republic Health. LeRoy A. Pesch is the principal stockholder of Pesch. "We have not been approached by Mr. Pesch or anybody else with respect to our holdings" in Republic Health, a McDonnell Douglas spokesman told Reuters.