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American 11 and United 1 75Radar-based TimelinewithFAA/NORAD Transcript Information

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) )American Air 11 Departs Boston08:00 EOT

71W

0800:27Check in with J"Boston TRACONif

o

0805:40Check in withBoston Center

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)American Air 11 Normal Flight Interrupted

08:00 - 0813 EOT

Last AA1Transmission0813:31

BosoxSector47RBostonSector46RTwo attempts by46R for a roger on theurn, 0813:37, 0813:50

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American Air 11 Silent Flight, Transponding08:14 - 0820 EOT

SchenectadyD Transponder Off0820:26 46R: CommsCheck with

N3.17ML38R: NordoBostonSector46R

AthensSector38RNo Handoff

Scopes on the search-46R Boston Sector Controller-38R Athens Sector Controller-47RA Bosox Radar Associate-38RA Athens Radar Associate

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r )American Air 11 Turns South

08:20 - 0827 EOT73W

43N

Five Radars Tracking-North Truro, MA-Dansville, NY-Remsen, NY-Riverhead, NY-Gibbsboro, NJ

47R AcknowledgesUA175

Schenectady0Transponder Off0820:26 '

7 more attempts TAdditional scope s on the search-39R Cambridge Sector Controller-36R Gardner Se ctor C ontroller-10RA Rockdale Radar Associate-47R Bosox Sector Controller

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American Air 11 Voice Transmissions08:24-0826 EOT

"47R: we think som eone is in cockpit"0825:38

"38R: callsupervisor"0825:50

no moves0824:56

73W

"46R: who 's trying to call""American eleven are you trying to call0824:46-0824:53"we have some planes"0824:38

A A

Schenectadyn / AAlbanyl"unintelligible" "R46:ls thatAA11 trying to call0824:33

Riverhead Radar only

43N

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American Air 11 South to the Hudson0827-0835 EOT

CCEast notified

ClevelandNew YorkBoston Centersnotified0829:40

42NKingston p

Boston TMU call to CAPETRACON.OtisAFB0834:30-0835:58

73W

Additional scopes on the search-24R Delancey Sector Controller-47RA Bosox Radar Associate-20RA Kingston Radar Associate-36RA Gardner Radar Associate-22R Albany Sector Controller-21R Canan Sector Controller-05R Stewart Sector Controller-09RA Utica Radar Associate-R56 New York-R51 New York

"no stupidmoves"0833:59

0835:38

Planes queried-USA583-COA389-N62775N-BTA4042-Comair949-Delta1989-UA175-Delta9930-Eagle936-USAir1251-Delta2031

)

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American Air 11 Final Leg0835 -0846 EOT

41N

Boston MOS call to NEADS0837:52-0839:58Recorded at both ends

CCE ast, Boston, NY TRAC ONdiscuss AA11 .Boston-losing speedrapidly, primary only believe in thedescent.0840:39Boston, NY TRACON discussAA11 ,NY USA583 thought hewas at twenty-nine, wait a sec,confirmed by another plane fivemiles ago, still level two nine zerolooks like not going to Kennedy0842:57

Situational Awareness ConflictedUSA583 reports ELT onguard frequency 0844:04DAL2433 picked it up too0805:07

UA175 reports suspicioustransmission out of

CCEast will handleWashington0842:37

Last radar return 0845:48UA175 changes Mode 3At 0846:24Commission Sensitive

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)American Air 11 United Air 175

0837 - 0903 EOTU A 1 7 5 s e e s A A 1at 29,0838:04 0840

0841842^

0843

0837:130839:1UA175 last transm ission "Didyou copy that" 0842:12

Transmission

NY asks UA175 torecycle transponder0851:43

UA175Mode3changes

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American Air 11 Close Up0837 - 0846 EOT

74W 0839:00\0ft124400

Boston to Herndon: in descent, slowing downH9200

MOS to NEADS: last altitude 29 0, not confirmedNY to USAIR flight: Heading south at 290Boston to New York: Showing 29 no verification

Boston to N ew York: USAir thought twenty-nineNEADS to Boston: descending to two nine zero

ATM to ZNY OM IC: AA11 twoniner zero, confirmed through radarverification from other aircraftDelta2433: two niner zero, picked up ELT

14800

18800

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) ) )Otis Scramble and Training, Full Sequence

as of 0937 EO T

9:13:07

9:21:359:22:36

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AnomaliesAA11 Take over 13+ minutes after takeoff; UA175almost 30 minutes after takeoffNEADS not contacted until 13 minutes after AA11determined to be hijackedAA11 turns transponder off, UA175 leaves on butchanges code twice shortly after AA 11 impactELT transmission linked to AA11 by controllersUA175 location SW of Kennedy linked to AA11 bycontrollers who hold AA11 at 29K a ltitudeManagement perception AA11 slowing and descendingnot shared by controllers and not shared with NEADS

NEADS cannot find the primary track until just at impactand does not establish the low altitude

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Boston ARTCCRough Sketch

MilitarySTMC

TMU

NAS OPSArea B

R39 AthensCambridgeR38 Gardner R36

Sectors

Area D

Area CBosox R47BostonSectors R4b

AlbanyUticaRockdaleSectors

R22

R09R10

Area A

Area ER21 CananKingston R20

StewartR05 Sectors

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