Despite the pro-GNA L-39ZO Albatros having mediocre combat characteristics, they avoided combat losses—one pro-GNA L-39ZO crashed due to technical problems near the University of Sirte on 10 August 2016 (ISIL claims that they shot it down); both of its pilots, commander of Misrata air force base brigadier general Mukhtar Fakroun and co-pilot colonel Omar Dogha, died in the crash. With the help of Ukrainian specialists, pro-GNA air forces also managed to bring back to service several major transport aircraft that were in storage for over a decade—one CH-130H Hercules (serial number "118"), one An-32P, and one Il-78 (serial number 5A-DLL—this is a former Libyan People's Air force aerial refueling aircraft, but now used solely as a transport aircraft by pro-GNA forces), all of which were flown by Sudanese mercenaries.