(S (S (BASENP (DT A) (NN spokesperson)) (VP (VBD confirmed) (SBAR (IN that) (S (BASENP (NNS tests)) (VP (VBD had) (VP (VBN been) (VP (VP (VBN performed) (QT (DQL ``) (PP (IN in) (NP (BASENP (JJ close) (NN consultation)) (PP (IN with) (BASENP (NNP Rolls-Royce) (CC and) (NNP Airbus))))) (DQR ''))) (PP (IN on) (NP (BASENP (DT the) (NN model) (POS 's)) (BASENP (NNP Trent) (NNP 900) (NNS engines))))))))))) (PERIOD .))