T8 B15 Hijacked Airplaner 1 Of 3 Fdr- Table- Terrorist Pilot Manipulation Of Transponders

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April 2020
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Terrorist Pilot Manipulation of Aircraft Transponders Aircraft Time Action Effect Result AA11 1220 Off Known Target Unknown Altitude (FAA) FAA tracked, not effectively communicated to NEADS Unknown Target Unknown Location (NEADS) NEADS picked up target, no track, just before impact UA175 1247 Change Known Target Unknown Location (FAA) 1248 Change Unknown Target Known Location (FAA)

FAA lost UA175, never communicated to NEADS FAA picked up intruder, never communicated to NEADS

AA77

1256

Off

Unknown Target Unknown Location (FAA) FAA lost AA77 and reported as possibly crashed Unknown Target Unknown Location (NEADS) FAA and NEADS picked up intruder in last minutes

UA93

1341

Off

Known Target Known Location (FAA) Wrong Target Known Location (NEADS)

FAA maintained continuity, Pittsburgh Tower evacuated NEADS tracked DAL1989, followed it to west and back