▁( 4 9 % ▁share hold ing ) ▁with ▁China ▁Eastern ▁Airlines , ▁provides ▁aircraft ▁M RO ▁services , ▁located ▁in ▁Shang hai , ▁China ▁ST ▁A eros pace ▁( Gu ang z hou ) ▁A viation ▁Services ▁Co . ▁Ltd . ▁( ST AG ) ▁- ▁joint ▁vent ure ▁( 4 9 % ▁share hold ing ) ▁with ▁Gu ang d ong ▁Airport ▁Management ▁Cor p , ▁provides ▁aircraft ▁M RO ▁services , ▁located ▁in ▁Gu ang z hou , ▁China ▁ ▁Tur bine ▁Over ha ul ▁Services ▁( T OS ) ▁- ▁joint ▁vent ure ▁( 4 9 % ▁share hold ing ) ▁with ▁Pr att ▁& ▁Whit ney , ▁special ises ▁in ▁the ▁repair ▁of ▁gas ▁and ▁steam - related ▁components . ▁El be ▁Flug zeug werke ▁GmbH ▁or ▁E AD S ▁EF W ▁- ▁inv ested ▁equ ity ▁interest ▁( 3 5 % ), ▁capabilities ▁include ▁passenger - to - fre ighter ▁convers ions , ▁aircraft ▁maintenance ▁and ▁repair , ▁as ▁well ▁as ▁engineering ▁services . ▁It ▁also ▁manufact ures ▁and ▁supplies ▁composite ▁flat ▁sand wich ▁pan els ▁to ▁Air bus . ▁ ▁Compos ite ▁Technology ▁International ▁( CT I ) ▁- ▁joint ▁vent ure ▁( 3 3 . 3 % ▁share hold ing ), ▁provides ▁over ha ul , ▁repair ▁and ▁modification ▁services ▁for ▁hel ic opter ▁rot or ▁bl ades . ▁ ▁Euro cop ter ▁South ▁East ▁Asia , ▁now ▁called ▁Air bus ▁Hel ic opter ▁South ▁East ▁Asia ▁- ▁joint ▁vent ure ▁( 2 5 %