Controllers would notify their supervisors, who in turn would inform management all the way up to FAA headquarters in Washington.
( Controllers ( ( would ( notify ( ( ( their supervisors ) , ) ( who ( ( in turn ) ( would ( ( inform management ) ( ( ( all ( the way ) ) up ) ( to ( ( FAA headquarters ) ( in Washington ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Controllers)) (VP (MD would) (VP (VB notify) (NP (NP (PRP$ their) (NNS supervisors)) (, ,) (SBAR (WHNP (WP who)) (S (PP (IN in) (NP (NN turn))) (VP (MD would) (VP (VB inform) (NP (NN management)) (PP (ADVP (NP (PDT all) (DT the) (NN way)) (RB up)) (TO to) (NP (NP (NNP FAA) (NNS headquarters)) (PP (IN in) (NP (NNP Washington)))))))))))) (. .)))
Supervisors were notified and they would in turn tell FAA managers.
( ( ( ( Supervisors ( were notified ) ) and ) ( they ( ( would ( in turn ) ) ( tell ( FAA managers ) ) ) ) ) . )
(ROOT (S (S (NP (NNPS Supervisors)) (VP (VBD were) (VP (VBN notified)))) (CC and) (S (NP (PRP they)) (VP (MD would) (PP (IN in) (NP (NN turn))) (VP (VB tell) (NP (NNP FAA) (NNS managers))))) (. .)))