A federal district jury convicted a Florida man yesterday of making false statements to an Air Force contract review board that was investigating irregularities in the purchase of spare jet engine parts.

The Alexandria jury deliberated for about an hour before finding that Richard I. Horowitz, 46, of North Palm Beach had passed confidential price information from the Pratt & Whitney Aircraft Group, where he worked, to an associate in Connecticut, who also was bidding on spare parts contracts.

An Air Force spokesman said the conviction is believed to be the first for such an offense.

Horowitz had denied passing the information to Alfred T. Stanger in two affidavits he filed in 1984 with the Air Force Debarment and Suspension Review Board, according to court papers. The board then was investigating Horowitz and Stanger for alleged irregularities in the procurement of parts for the F100 jet engine.

Stanger owned Electro-Methods Inc., a South Windsor, Conn., firm that supplies spare parts for military jet engines. Electro-Methods was the primary client of Sandrich Associates, a contract consulting firm owned by Horowitz, according to prosecutors.

Horowitz also was employed at Pratt & Whitney, a jet engine manufacturer, where he supervised pricing formulations that were given to the Air Force for help in awarding contracts for spare parts, the prosecutors said.

During the four-day trial in U.S. District Court in Alexandria, Justice Department attorney Brenda Gruss presented rolls of computer printouts showing Horowitz's communications with Stanger. Included were Pratt & Whitney prices for spare parts for the F100 jet engines used by the Air Force, she said.

Horowitz, who remains free on personal recognizance, is to be sentenced Oct. 25. He faces a maximum penalty of 10 years in jail and a $20,000 fine.

Stanger was found guilty in Connecticut July 11 of 36 counts of bribing an Air Force employe and will be sentenced Sept. 30.

Horowitz and Stanger remain under investigation by the U.S. attorney's office in Connecticut, a spokesman said.