Deborah Hersman was appointed as NTSB Chairman in July 2009.

Let me know what NTSB says about that downed aircraft.

See also Southern Airways Flight 242 List of airline flights that required gliding References External links Air Space Magazine Description of the NASA Michoud Facility and Air Traffic Controller's account of the event NTSB Synopsis NTSB Brief NTSB Final Report Federal Aviation Administration accident overview

The NTSB has primacy in investigating every civil aviation accident in the United States (the Federal Aviation Administration (FAA) is always a party to these investigations, but the NTSB is the investigating agency).

In 2010, the NTSB published a study done on 8,000 general aviation light aircraft.

When requested, the NTSB will assist the military and foreign governments with accident investigation.

On June 24, 2014, the NTSB published to YouTube a narrated accident sequence animation.

Investigation The National Transportation Safety Board (NTSB) sent a team to the scene to investigate.

Supporters of these explanations claim that the NTSB's report was created as a cover up, that the NTSB did not investigate sufficiently, or that the NTSB did not have all the evidence it needed to reach the correct conclusion.

The NTSB is also in charge of investigating cases of hazardous materials releases that occur during transportation.

Investigations The NTSB is normally the lead organization in the investigation of a transportation accident within its sphere.

Investigation The United States National Transportation Safety Board (NTSB) and the Afghanistan Civil Aviation Authority investigated the crash.

We pulled the lab reports from the NTSB, and the chopper's engine tested positive for two distinct compounds.

The NTSB found this was widespread throughout the industry, prompting a safety recommendation to Exxon and to the industry.

The National Transportation Safety Board (NTSB) is an independent U.S. government investigative agency responsible for civil transportation accident investigation.

Investigation The Air Accidents Investigation Branch (AAIB) investigated the accident, with the US National Transportation Safety Board (NTSB), Boeing and Rolls Royce also participating.

During the course of its investigation, and in its final report, the NTSB issued fifteen safety recommendations, mostly covering fuel tank and wiring related issues.

Investigation The National Transportation Safety Board (NTSB) announced that they would send a team to the crash site on February 13 to begin the investigation.

The NTSB concluded that the in flight breakup of TWA flight 800 was not initiated by a preexisting condition resulting in a structural failure and decompression.

The NTSB concluded that the most likely source of sufficient voltage to cause ignition was a short from damaged wiring, or within electrical components of the FQIS.

The FBI's earliest investigations and interviews, later used by the NTSB, were performed under the assumption of a missile attack, a fact noted in the NTSB's final report.

At the request of the Egyptian government, the US National Transportation Safety Board (NTSB) took the lead in this investigation, with the Egyptian Civil Aviation Authority (ECAA) participating.

For certain accidents, due to resource limitations, the Board will ask the FAA to collect the factual information at the scene of the accident the NTSB bases its report on that information.

The NTSB considered the possibility that the explosive residue was due to contamination from the aircraft's use in 1991 transporting troops during the Gulf War or its use in a dog training explosive detection exercise about one month before the accident.

Based on these simulations the NTSB concluded that it was very unlikely that a warhead detonated in such a location where a fragment could penetrate the CWT, but no other fragments impact the surrounding airplane structure leaving distinctive impact marks.

Although it was unable to determine the exact source of the trace amounts of explosive residue found on the wreckage, the lack of any other corroborating evidence associated with a high energy explosion led the NTSB to conclude that the in flight breakup of TWA flight 800 was not initiated by a bomb or missile strike.

Testing by the NTSB and the British Defence Evaluation and Research Agency demonstrated that when metal of the same type and thickness of the CWT was penetrated by a small charge, there was petalling of the surface where the charge was placed, pitting on the adjacent surfaces, and visible hot gas washing damage in the surrounding area.

Missile fragment or small explosive charge Although the NTSB had already reached the conclusion that a missile strike did not cause the structural failure of the airplane, the possibility that a missile could have exploded close enough to TWA 800 for a missile fragment to have entered the CWT and ignited the fuel air vapor, yet far enough away not to have left any damage characteristic of a missile strike, was considered.

Other potential sources The NTSB also investigated whether the fuel air mixture in the CWT could have been ignited by lightning strike, meteor strike, auto ignition or hot surface ignition, a fire migrating to the CWT from another fuel tank via the vent system, an uncontained engine failure, a turbine burst in the air conditioning packs beneath the CWT, a malfunctioning CWT jettison override pump, a malfunctioning CWT scavenger pump, or static electricity.

See also List of tenants in One World Trade Center List of tenants in Two World Trade Center Communication during the September 11 attacks References External links The Final 9 11 Commission Report CNN September 11 Memorial page, with passenger and crew lists 9 11 NTSB Report Picture of aircraft Pre 9 11 September 11, 2001 archive of United Airlines site with condolences for deceased (Archive) Page with additional information, from September 12, 2001 (Archive)