(S (S (NP (BASENP (DT The) (NN plane) (POS 's)) (NP (NP (NP (NNP Aircraft) (NP (BASENP (NNPS Communications) (NNP Addressing)) (CC and) (BASENP (NNP Reporting)))) (NNP System)) (PRN (LRB -LRB-) (BASENP (NNP ACARS)) (RRB -RRB-)))) (VP (VP (VBD sent) (PRT (RP out))) (NP (NP (BASENP (NN 24) (NNS messages)) (BASENP (RB over) (DT a) (JJ four-minute) (JJ long) (NN period))) (VP (VP (VBG stating) (NP (BASENP (JJ numerous) (NNS problems) (CC and) (NNS warnings)) (PRN (COMMA ,) (PP (VBG including) (NP (BASENP (JJ incorrect) (NN air) (NN speed) (NNS warnings)) (VP (VBG occurring) (PP (IN aboard) (BASENP (DT the) (NN aircraft)))))) (COMMA ,)))) (ADVP (ADVP (RB just) (RB prior)) (PP (TO to) (S (BASENP (PRP it)) (VP (VBG going) (PRT (RP down)))))))))) (PERIOD .))