Air Force (BAF) was offered two types of attack helicopters and selected the AH-64, pending government approval. However, due to the Apache's high costs, the BAF choose the competing Russian Mi-28NE Night Hunter. In November 2019, the U.S. State Department approved a FMS to Morocco of 24 AH-64Es (with an option for a further 12), this allows Morocco to negotiate an order. On 30 April 2020, the U.S. Defense Security Cooperation Agency announced it had received U.S. State Department approval and notified Congress of a possible sale to the Philippines of either six AH-1Z attack helicopters and related equipment for an estimated cost of $450 million or six AH-64Es and related equipment for an estimated cost of $1.5 billion. On 21 April 2022, Polish Ministry of National Defence shortlisted two models in competition for the "Kruk" (Raven) Program aimed at modernizing the Polish Land Forces' fleet of attack helicopters, with the competitors being the AH-64E and Bell's AH-1Z Viper. On 8 September 2022, Polish Minister of Defence Mariusz Błaszczak announced that the AH-64E has won and set out to procure 96 helicopters to form six squadrons. Variants AH-64A The AH-64A is the original production attack helicopter. The crew sit in tandem in an armored compartment. It is powered by two GE T700 turboshaft engines. The A-model was equipped with the −701 engine version until 1990 when the engines were switched to the more powerful −701C version. U.S. Army AH-64As are being converted to AH-64Ds. The service's last AH-64A was taken out of service in July 2012 before conversion at Boeing's facility in Mesa, Arizona. On 25 September 2012, Boeing received a $136.8M contract to remanufacture the last 16 AH-64As into the AH-64D Block II version and this was planned to be completed by December 2013. AH-64B In 1991, after Operation Desert Storm, the AH-64B was a proposed upgrade to 254 AH-64As. The upgrade would have included new rotor blades, a Global Positioning System (GPS), improved navigation systems and new radios. U.S. Congress approved $82M to begin the Apache B upgrade. The B program was canceled in 1992. The radio, navigation, and GPS modifications were later installed on most AH-64As via other upgrades. AH-64C Additional funding from Congress in late 1991 resulted in a program to upgrade AH-64As to an AH-64B+ version. More funding changed the plan to upgrade to AH-64C, which would include all of the changes to be included