The last major collision of a commercial U.S. airline dates back to 2009, when a Colgan Air incident left 50 dead near Buffalo, New York. Federal regulators tightened safety requirements following the crash, including bolstering aircraft carrier inspection requirements and pilot training hours.

An American Airlines regional jet collided with a military helicopter as it was approaching Reagan National Airport.

Other carriers on the WTW-placed covers understood to have written sizable lines include AIG, Convex and Allianz. MGAs United States Aviation Insurance Group (USAIG) and La Réunion Aérienne (LRA) are believed to have written lines in the high single digits.

An aviation attorney told Fox News Digital he expects the families of the victims of Wednesday's midair collision will file lawsuits in the coming days.

An American Airlines regional jet went down in the Potomac River near Washington, D.C.'s Ronald Reagan Washington National Airport after colliding with a U.S. Army Black Hawk helicopter on Wednesday night, with no survivors expected.

An American Airlines jet carrying 64 people collided Wednesday with a helicopter near Reagan Washington National Airport, with no survivors expected.

American Airlines CEO Robert Isom on Thursday morning expressed his condolences to the family and loved ones of those aboard a flight that collided with a military helicopter Wednesday night.

Following the fatal midair collision in Washington, D.C. between a commercial passenger jet and an Army helicopter, Families of Flight 3407 lend their hand in support of the families of the victims of Wednesday’s tragedy.

The crash is the deadliest in the country since 2009. On Feb. 12 of that year, Colgan Air Flight 3407 crashed shortly before its scheduled landing at the Buffalo Niagara International Airport. 49 passengers and a person inside the home the plane landed on were killed.

Fatal crashes like the one that happened near Washington on Wednesday are increasingly rare because of modern aviation safety procedures.

The midair collision of an American Eagle-branded regional jet and a Sikorsky UH-60 helicopter near Washington, DC may be the first fatal crash involving a US airline since the 2009 crash of a Colgan Air-operated regional jet that killed 50 people.