 Shortages of Phoenix missiles, led to attempts to integrate the Russian R-27 semi-active radar-guided missile, but these proved unsuccessful.An alternative was the use of modified MIM-23 Hawk missiles to replace the Tomcat's Phoenixes and Sparrows, but as the Tomcat could only carry two Hawks, this project was also abandoned, and the Fakour-90 missile, which used the guidance system of the Hawk packaged into the airframe of the Phoenix, launched.Pre-production Fakour-90s were delivered in 2017, and a production order for 100 missiles (now designated AIM-23B) was placed in 2018, intending to replace the F-14s AIM-7E Sparrow missiles.