Kammala jumla mai zuwa: Fitowar Yaƙin Duniya na Biyu a Turai a watan Satumbar 1939 ya ga wani ɓangare na rundunar da aka tura a kan jiragen ruwa da jiragen ruwa daga Madras, kafin a ranar 1 ga Oktoba 1939, rundunar ta zama makarantar horar da jiragen sama don horar da matukan jirgi na Sojan Sama na Indiya, suna aiki da Havilland Tiger Moth da Hawker Hart biplanes da Wapitis, kuma suna zaune a Risalpur. Yawancin tsoffin matukan jirgi masu aiki na rundunar sun yi aiki da jigilar Bristol Blenheim daga Masar zuwa Indiya da Gabas ta Tsakiya, kuma a watan Janairun 1941, an fara isar da Blenheims ga rundunar, wanda ya ba da damar rarraba rundunar 27 da ke dauke da Blenheim daga makarantar horo a watan Fabrairu kuma aka aika zuwa Singapore. Blenheims na rundunar sun kasance Mk IF jirgin sama, sanye take da gun-pack karkashin fuselage don amfani a matsayin mai nisa da kuma dare jirgin saman soja, kuma su ne kawai RAF dare jirgin saman soja a Far East. Squadron ya koma Butterworth a watan Mayu 1941 kuma zuwa Sungai Petani a watan Agusta na wannan shekarar.
Japan ta mamaye Malaya a ranar 8 ga Disamba, 1941, kuma Rundunar Soji ta 27 ta tashi daga Blenheims takwas a wannan safiya don kai hari kan jiragen ruwan mamayewar Japan. Mummunan yanayi ya hana su gano duk wani jirgin ruwan Japan, duk da haka, da hare-haren iska a kan Sungai Petani a wannan ranar ya lalata filin jirgin sama kuma ya bar rundunar tare da jiragen sama guda hudu kawai. An kwashe shi zuwa Butterworth a wannan maraice. Sauran jiragen sama sun koma Singapore a ranar 12 ga Disamba, inda suka, tare da wasu Blenheim Is daga wasu rundunonin da ke aiki a karkashin sunan 27 Squadron. Sauran Blenheims da ke zaune a Singapore, gami da na Squadron 27 an kwashe su zuwa Sumatra daga ranar 23 ga Janairu, 1941, suna aiki daga Palembang. A ranar 14 ga Fabrairu huɗu daga cikin Blenheims sun kai hari kan jiragen ruwan Japan da ke mamaye Sumatra, tare da asarar Blenheims biyu, tare da duk jirgin sama mai tashi da jirgin sama zuwa Java a ranar 15 ga Fabrairu. A nan rundunar ta daina wanzuwa.