The Republic of Singapore Air Force's new fleet of 20 F-16 Fighting Falcons is to be powered by Pratt & Whitney F100-PW-229 engines. Deliveries begin in March 2003. The earlier -220 model of the same engine powers the RSAF's current force of F-16s. In the past nine months three other countries have made the same engine choice. The Israeli, South Korean and Greek air forces have ordered F100-PW-229s for a total of 130 new F-16s. The PW-229 has now logged some 500,000 flight hours. It serves with five air forces.