Rohr Industries said it has no explanation...

Rohr Industries said it has no explanation for the $1.625 gain in its stock price in heavy trading on the New York Stock Exchange on Wednesday. Rohr’s shares closed at $31.25 on volume of 421,700 shares, or about six times normal trading activity.

Chairman Harry Todd told a Dow Jones reporter that he has not been approached by anyone interested in launching a takeover, nor has he heard any rumors that such a takeover was in the works. Headquartered in Chula Vista, Rohr manufactures jet engine components used in most commercial aircraft.

An analyst with Kleinwort Benson Securities of New York issued a strong “buy” recommendation on Rohr last week after Braniff placed an order for 50 Airbus Industrie A320 planes with an option for 50 more, Dow Jones said. The value of the order to Rohr was estimated by Todd at about $2 million a plane.