Tests carried out on the vertical stabilizers from the accident aircraft, and from another similar aircraft, found that the strength of the composite material had not been compromised, and the NTSB concluded that the material had failed because it had been stressed beyond its design limit, despite ten previous recorded incidents where A300 tail fins had been stressed beyond their design limitation in which none resulted in the separation of the vertical stabilizer in-flight.

The NTSB found that the crash was the fault of truck driver Ruben Perez.

The National Transportation Safety Board ( NTSB ) investigation found that the crash was a result of a failure in the train's computer-controlled braking system.

Congress, the Federal Bureau of Investigation ( FBI ), and the National Transportation Safety Board ( NTSB ) investigated the crash, and found it to be an accident caused by crew error.

The NTSB found Enbridge knew of a defect in the pipeline five years before it burst.

The NTSB announced they had " not found any major mechanical errors with the school bus ," however did note that the brakes were out of adjustment.

The National Transportation Safety Board ( NTSB ) found that the probable cause of the accident to be the procedures in use at the Los Angeles International Airport control tower provided inadequate redundancy that led to a loss of situational awareness by the local controller.

The NTSB also found the following contributing factor :" Contributing to the accident was the continued use of runway 22L when it should have become evident to both air traffic control personnel and the flight crew that a severe weather hazard existed along the approach path.

A subsequent NTSB investigation found the cause of the derailment to be a broken rail within the switch that was the result of an undetected bolt hole fracture.

NTSB reports found human remains in the fan blades of the Number 3 engine, suggesting that some of the victims died almost instantly as they were pulled out of the plane.

An investigation by the NTSB found that the aircraft should have been able to climb on one engine.

Although, when the cockpit was examined, the engine anti-ice switch was found in the ' OFF ' position, further investigations found that even slight pressure could move the switch, and the NTSB ruled this out as a contributing factor in the crash.

When the NTSB, in collaboration with Fokker, investigated the effect ice can have on an aircraft, they found that ice particles as small as 1-2mm of a density of one particle per square centimeter can cause a loss of lift of over 20 %.

The NTSB evaluated the data from the tests and found that the pilot initiated the rotation five knots earlier at 119 knots instead of the proper rotation speed of 124 knots.

The National Transportation Safety Board ( NTSB ) investigation found that, while the bus driver was not aware of the fact that a portion of the bus was on the tracks as she should have been, the timing of signals was so insufficient that, even if she had identified the hazard as the train approached, she would have had to proceed against a red traffic signal into the highway intersection to have moved out of the train's path.

The NTSB also found various procedural failures in the dissemination and retrieval of flight safety information, which contributed to the accident.

Deborah Hersman was appointed as NTSB Chairman in July 2009.

The NTSB was established in 1967 as the federal government's primary accident investigation agency for all modes of transportation – aviation, highway, rail, marine and pipeline.

While accident investigators from the National Transportation Safety Board ( NTSB ) traveled to the scene, arriving the following morning, there was much initial speculation that a terrorist attack was the cause of the crash.

This video, released by the NTSB, was recorded by a Toll booth | toll-booth camera located on the Marine Parkway-Gil Hodges Memorial Bridge.

The National Transportation Safety Board ( NTSB ) concluded that the enormous stress on the rudder was due to the first officer's " unnecessary and excessive " rudder inputs, and not the wake turbulence caused by the 747.

The official NTSB report of October 26, 2004 stated that the cause of the crash was the overuse of the rudder to counter wake turbulence.

The crash was witnessed by hundreds of people, 349 of whom gave accounts of what they saw to the NTSB.

Nicholas Stix of Middle American News recounted the mutually contradictory theories that the NTSB had floated immediately following the crash, the statements made by retired fire fighters and police officers who had witnessed the crash, and the history of similar crashes, and concluded that the agency was frantically seeking to calm a public whose faith in commercial aviation had hit rock bottom.

Over that time he was interviewed on several hundred radio programs and appeared on several national TV broadcasts as an expert aircraft crash investigator and vocal critic of the NTSB and FBI investigation.

NTSB investigation ruled the accident was probably due to low fuel.

The official NTSB report said that the probable cause was mechanical.

Jim Burnett, then-Chairman of the NTSB, however, said that even though the plane was infested with smoke, the plane landed and came to a stop before it was swallowed by flames.

The NTSB conducted a year-long investigation and finally stated that, while the definitive cause was still unknown, the crash was probably due to a gas-fueled heater that reportedly had caused in-flight problems.

Rank was criticized by the NTSB for not following the in-flight fire checklist ; opening the fresh air vents instead of leaving them closed, not instructing the passengers to use supplemental oxygen, and not attempting to fight the fire with the hand-held fire extinguisher that was in the cockpit.

" The words of the NTSB seem to echo that of firefighter, Lewis Glover, who was one of the first on the scene.

The NTSB in their after accident reported noted, " The performance of the flight attendants during the emergency was exceptional and probably contributed to the success of the emergency evacuation.

The U. S. National Transportation Safety Board ( NTSB ) investigated the crash and concluded it was caused by the flight instructor's improper decision to take off in poor weather conditions, his overloading the aircraft, and his failure to maintain airspeed, which resulted in a stall.

The NTSB also determined that " contributing to the decision to take off was a desire to adhere to an overly ambitious itinerary, in part, because of media commitments.

Pilots and airline personnel throughout the industry petitioned the NTSB to revise its report.

Blakey worked to improve the Board's accident reporting process and increased industry and regulatory responsiveness to NTSB safety recommendations.

The NTSB has issued about 13, 000 safety recommendations in its history, the vast majority of which have been adopted in whole or in part by the entities to which they were directed.

Among transportation safety improvements brought about or inspired by NTSB recommendations:

Actions of flight attendants in emergencies have long been credited in saving lives ; in the United States, the National Transportation Safety Board ( NTSB ) and other aviation authorities view flight attendants as essential for safety, and are thus required on Part 121 aircraft operations.

The NTSB is considering EVS as recommended equipment for safety features.

The NTSB added a safety recommendation to the FAA on its " List of Most Wanted Safety Improvements " in May 1999 suggesting a requirement for children under 2 to be safely restrained, which was removed in November 2006.

Air Sunshine has a slightly better than average safety record between 1997 and 2004 per the NTSB.

The safety issues stemming from the incident were of such concern that the United States National Transportation Safety Board ( NTSB ) issued safety recommendations to the Federal Aviation Administration ( FAA ).

She also furthered development of the NTSB Academy as an international resource to enhance aviation safety and accident investigations.