At 9:29, the autopilot on American 77 was disengaged; the aircraft was at 7,000 feet and approximately 38 miles west of the Pentagon.
( ( ( ( ( At 9:29 ) ( , ( ( ( the autopilot ) ( on ( American 77 ) ) ) ( was disengaged ) ) ) ) ; ) ( ( the aircraft ) ( was ( at ( ( ( 7,000 feet ) and ) ( ( ( approximately 38 ) miles ) ( west ( of ( the Pentagon ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (PP (IN At) (NP (CD 9:29))) (, ,) (NP (NP (DT the) (NN autopilot)) (PP (IN on) (NP (NNP American) (CD 77)))) (VP (VBD was) (VP (VBN disengaged)))) (: ;) (S (NP (DT the) (NN aircraft)) (VP (VBD was) (PP (IN at) (NP (NP (CD 7,000) (NNS feet)) (CC and) (NP (NP (QP (RB approximately) (CD 38)) (NNS miles)) (PP (ADVP (NN west)) (IN of) (NP (DT the) (NNP Pentagon)))))))) (. .)))
The autopilot on American 77 was turned off at 9:29 so the plane could return to the airport.
( ( ( The autopilot ) ( on ( American 77 ) ) ) ( ( was ( ( ( turned off ) ( at 9:29 ) ) ( so ( ( the plane ) ( could ( return ( to ( the airport ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN autopilot)) (PP (IN on) (NP (NNP American) (CD 77)))) (VP (VBD was) (VP (VBN turned) (PRT (RP off)) (PP (IN at) (NP (CD 9:29))) (SBAR (IN so) (S (NP (DT the) (NN plane)) (VP (MD could) (VP (VB return) (PP (TO to) (NP (DT the) (NN airport))))))))) (. .)))