' s , ▁P yl on ▁Mod ification , ▁Cab in ▁Re - configuration , ▁aircraft ▁painting ▁and ▁re - we igh . ▁ ▁It ▁also ▁provided ▁similar ▁services ▁to ▁the ▁A 3 2 0 ▁family ▁of ▁aircraft . ▁ ▁International ▁Custom ers ▁of ▁R BE ▁included ▁Air ▁Maur it ius , ▁An sett ▁World wide , ▁Britann ia ▁Air ways , ▁Turk men istan ▁Airlines , ▁Vietnam ▁Airlines , ▁and ▁Th ai ▁Jet ▁Air ways . ▁ ▁In ▁November ▁ 2 0 0 7 , ▁the ▁Board ▁directed ▁the ▁subs idi ary ▁to ▁ce ase ▁third ▁party ▁maintenance ▁activities ▁and ▁to ▁concent rate ▁on ▁maintain ing ▁the ▁air line ' s ▁own ▁aircraft . ▁ ▁References ▁ ▁Category : Ro yal ▁Br une i ▁Airlines <0x0A> </s> ▁German ▁sub marine ▁U - 2 5 7 ▁was ▁a ▁Type ▁VII C ▁U - bo at ▁of ▁Naz i ▁Germany ' s ▁Kriegs marine ▁during ▁World ▁War ▁II . ▁She ▁was ▁laid ▁down ▁at ▁the ▁Bre mer ▁V ul kan ▁yard ▁at ▁Bre men - V eg es ack ▁on ▁ 2 2 ▁February ▁ 1 9 4 1 ▁as ▁yard ▁number ▁ 2 2 . ▁She ▁was ▁launched ▁on ▁ 1 9 ▁November ▁and ▁commission ed ▁on ▁ 1 4 ▁January ▁ 1 9 4 2 ▁under ▁the ▁command ▁of ▁Kap it än le ut nant ▁Hein z ▁Ra he . ▁ ▁U - 2 5 7 ▁was ▁assigned ▁to ▁the ▁ 5 th ▁U - Bo at ▁Fl ot illa ▁for ▁training