▁co ck pit ▁being ▁known ▁in ▁the ▁R AF ▁as ▁" t aps ▁and ▁t its ". ▁Prior ▁to ▁maintenance , ▁serv icing , ▁or ▁systems ▁testing , ▁aircraft ▁te chs / me chs ▁would ▁first ▁check ▁that ▁certain ▁" t aps ▁and ▁t its " ▁were ▁" up " ▁( in ▁the ▁off / safe ▁position ). ▁A ▁ver bal ▁safety ▁call / response ▁was ▁required ▁for ▁confirm ation , ▁( such ▁as ▁" t its ▁up "). ▁( 2 ) ▁Pl ans ▁or ▁circumstances ▁that ▁have ▁gone ▁completely ▁wrong . T its ▁up , ▁on ▁st icks , ▁d un lo ps ▁d ang ling ▁- ▁Un service able ▁aircraft ▁on ▁j acks , ▁with ▁under car riage ▁down . T IS W AS ▁( TS W ) ▁( ab bre viation ) ▁- ▁T act ical ▁Supp ly ▁Wing ▁- ▁they ▁do ▁hot ▁ref u els ▁etc . ▁After ▁the ▁k ids ▁TV ▁show . T MT ▁( ab bre viation ) ▁- ▁Trade ▁Management ▁Training . To aster s ▁- ▁The ▁dangerous ▁back ▁end ▁of ▁a ▁jet . TO ET ' s ▁( ab bre viation ) ▁- ▁Test ▁of ▁Element ary ▁Training . ▁Typ ically , ▁applies ▁to ▁the ▁weapons ▁prof ic iency ▁testing ▁( small ▁arms ) ▁of ▁R AF ▁personnel . ▁( P ron ounced ▁- ▁To e - w ets ). TO GA ▁- ▁Take ▁Off ▁and ▁Go ▁Ar ound . ▁Also ▁known ▁as ▁' circ uits ▁and ▁b umps ' ▁or ▁simply ▁' circ