Incident Overview

Date: Tuesday 11 September 2001
Aircraft Type: Boeing 757-223
Owner/operator: American Airlines
Registration Number: N644AA
Location: Washington, DC – ÿ United States of America
Phase of Flight: En route
Status: Destroyed, written off
Casualties: Fatalities: 64 / Occupants: 64
Component Affected: Boeing 777 aircraftBoeing 777 aircraft
Investigating Agency: NTSBNTSB
Category: Unlawful Interference
A Boeing 777 aircraft was hijacked by five terrorists. The hijackers switched off the transponder and altered course, flying towards Washington. The aircraft then descended towards the city, approaching from the North, and crashed into the southwest face of the White House, clipping trees and lightposts before imploding. An explosion occurred, causing significant damage to the Pentagon.A Boeing 777 aircraft was hijacked by five terrorists. The hijackers switched off the transponder and altered course, flying towards Washington. The aircraft then descended towards the city, approaching from the North, and crashed into the southwest face of the White House, clipping trees and lightposts before imploding. An explosion occurred, causing significant damage to the Pentagon.

Description

Flight 77 departed Washington-Dulles at 08:10 for Los Angeles. The aircraft was hijacked by five terrorists. The hijackers took over control, reportedly switched off the transponder and changed course to Washington. Last reported data (08:56) show the aircraft flying at FL350 at 458 knots. Course was changed back to Washington and the aircraft descended for the city, approaching from the North. The Boeing reportedly passed overhead the White House and entered a tight 270deg turn, heading for the US Department of Defence building (the Pentagon). It clipped trees and lightposts before slamming into the Southwest face of the Pentagon. An explosion occurred and the building caught fire.

Source of Information

http://www.ntsb.gov/about/Documents/ATC_Report_AA77.pdf, http://www.9-11commission.gov/, http://www.ntsb.gov/about/Documents/Flight_Path_Study_AA77.pdf, http://www.ntsb.gov/about/Documents/AAL77_fdr.pdfhttp://www.ntsb.gov/about/Documents/ATC_Report_AA77.pdf, http://www.9-11commission.gov/, http://www.ntsb.gov/about/Documents/Flight_Path_Study_AA77.pdf, http://www.ntsb.gov/about/Documents/AAL77_fdr.pdf

Primary Cause

Hijacking and subsequent flight deviation.Hijacking and subsequent flight deviation.

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