▁ ▁air frame ▁heavy ▁maintenance ▁ ▁av iation ▁support ▁and ▁services ▁ ▁A ircraft ▁Main ten ance ▁and ▁Mod ifications ▁( AM M ) ▁With ▁their ▁A MM ▁operation ▁arm , ▁ST ▁A eros pace ▁perform ▁light ▁and ▁heavy ▁maintenance , ▁up gr ades , ▁struct ural ▁rep airs , ▁age ing ▁modification ▁work ▁and ▁convers ions ▁for ▁a ▁broad ▁range ▁of ▁commercial ▁and ▁military ▁aircraft . ▁ ▁Com ponents ▁and ▁Eng ines ▁Total ▁Support ▁( C ET S ) ▁Through ▁a ▁global ▁repair ▁and ▁log istics ▁support ▁network , ▁the ▁company ▁provides ▁aircraft ▁maintenance ▁repair ▁and ▁over ha ul ▁services ▁for ▁a ▁wide ▁range ▁of ▁aircraft ▁components ▁and ▁engines . ▁They ▁offer ▁services ▁for ▁av ion ics ▁( including ▁elect rical , ▁rad ar / communic ations , ▁instruments ▁and ▁electro - opt ics ), ▁mechanical ▁components ▁( including ▁hel i - d ynam ics , ▁hyd ra ul ics , ▁p neum at ics ▁and ▁prop ellers ) ▁and ▁engines ▁support ▁( such ▁as ▁CF M 5 6 - 3 /- 7 B , ▁J T 8 - D , ▁J 8 5 , ▁F 4 0 4 , ▁F 1 0 0 , ▁T 5 3 , ▁T 5 5 , ▁T 5 6 , ▁Tur b ome ca ▁Mak ila ▁and ▁Ar riel ▁engines ). ▁ ▁ST ▁A eros pace ▁also ▁provides ▁a ▁wide ▁range ▁of ▁aircraft ▁component ▁maintenance ▁repair ▁and ▁over ha ul ▁services , ▁including ▁Main ten ance - By - the - H our ▁( MB