He searched along the plane's projected flight path and the airspace to the southwest where it had started to turn.
( He ( ( ( searched along ) ( ( ( ( the ( plane 's ) ) ( projected ( flight path ) ) ) and ) ( ( the airspace ) ( to ( ( the southwest ) ( where ( it ( had ( started ( to turn ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD searched) (PRT (RP along)) (NP (NP (NP (DT the) (NN plane) (POS 's)) (VBN projected) (NN flight) (NN path)) (CC and) (NP (NP (DT the) (NN airspace)) (PP (TO to) (NP (NP (DT the) (NN southwest)) (SBAR (WHADVP (WRB where)) (S (NP (PRP it)) (VP (VBD had) (VP (VBN started) (S (VP (TO to) (VP (VB turn))))))))))))) (. .)))
He never knew what the projected flight plan was.
( He ( never ( ( knew ( what ( ( the ( projected ( flight plan ) ) ) was ) ) ) . ) ) )
(ROOT (S (NP (PRP He)) (ADVP (RB never)) (VP (VBD knew) (SBAR (WHNP (WP what)) (S (NP (DT the) (VBN projected) (NN flight) (NN plan)) (VP (VBD was))))) (. .)))