WARSAW, Poland, Oct. 2 (UPI) -- Two Polish air force F-16 jet fighters were forced into emergency landings because of malfunctions in electronic equipment, Polish Radio said Tuesday.

The jets landed safely thanks to experienced pilots, the Newsweek Polska reported.

Dozens of equipment failures have been registered since December when Poland placed U.S.-made F-16 jets into operation. The Polish armed forces have to pay all repairs and spare parts as the Polish government failed to include warranty clauses in the purchase contract.

The Defense Ministry ordered $123 million worth of spare parts for the F-16 jets that should cover repair needs by 2010, the radio said.