All 67 people on board the plane and the helicopter were killed in the crash.
Hundreds of families are in mourning after an American Airlines regional jet collided with a U.S. Army Black Hawk helicopter on Jan. 29, with both aircraft plunging into the Potomac River near Ronald Reagan Washington National Airport in Washington, D.C.
No one survived.
Sixty-four people were on board the plane, which departed from Wichita, Kansas. Three soldiers were on the helicopter.
Pieces of the downed Black Hawk helicopter were removed from the Potomac River on Thursday as the investigation into the cause of the crash continues.
The Federal Aviation Administration has notified airlines that it is "about to announce a slightly lower rate for" Reagan airport.
"Due to the two offload runways being closed, we are running a 28 arrival rate which is the maximum number in a peak operation for a single runway," the FAA said, according to an email obtained by ABC News.
This action is being taken as the FAA and National Transportation Safety Board investigators expressed concerns for the tower personnel on duty due to "an increased level of stress while also having a front row view of the accident recovery," the email said.
"We believe easing up on the gas a bit, and reducing from a 28 to a 26 rate, will reduce risk and allow a little space for extra coordination," the FAA said in the email.
-ABC News' Ayesha Ali
Sen. Maria Cantwell, D-Wash., wrote a letter to Transportation Secretary Sean Duffy, saying that involving Elon Musk in the Federal Aviation Administration’s safety system or process is a "conflict of interest."
"FAA has the legal responsibility for safety oversight of companies with commercial space transportation licenses," Cantwell wrote.
"Elon Musk’s SpaceX rocket launches share the airspace with commercial airplanes, and the FAA has the responsibility for keeping the entire airspace safe. SpaceX has been fined by the FAA for failing to comply with specific requirements in its launch license," Cantwell said. "Mr. Musk, in turn, called for the firing of Mike Whitaker, the FAA Administrator who the Senate confirmed 98-0 because the FAA issued a fine against SpaceX for not following the rules. We have ethics and recusal laws for a reason -- to prevent corporate interference in protecting the public interest."
-ABC News’ Clara McMichael
Sen. Ted Cruz, R-Texas, chair of the Senate Commerce Science and Transportation Committee, told reporters he learned that the data from the Automatic Dependent Surveillance-Broadcast (ADS-B) tracking system for the military helicopter was "turned off" when the committee was briefed by the Federal Aviation Administration and the National Transportation Safety Board on Thursday.
Cruz said he raised questions at the briefing on why the ADS-B data on the Black Hawk was turned off, noting that the FAA rules allow military aircraft to disable the system only under certain circumstances.
Cruz said he "asked the Army to reconsider and assess with what frequency is the Army turning off ADS-B out on military missions, particularly missions that do not have a sensitive national security component."
"The NTSB has recommended ADS-B in and ADS-B out on all aircraft, and that's something I expect the committee to consider and assess," Cruz said. "All of these are reasonable, important questions to ask in the wake of this accident. At the same time, I would caution what I said before: We need to look to the evidence and actually understand what happened here."
When asked if he supports reducing operations around Reagan airport, Cruz said, "There's no indication from the investigation that congestion was the cause of the accident."
"In this instance, it appears the Black Hawk helicopter was flying at a dramatically different altitude than where the helicopter was supposed to be, and the investigation needs to proceed. We need to understand why that is the case. The NTSB believes they will learn more when they recover the Black Hawk helicopter itself," Cruz said.
Cruz also said he asked the FAA to conduct a review of helicopter routes not just at Reagan, but at airports across the country.
Senators described the briefing as "very thorough," based on what the NTSB and FAA could share amid the ongoing investigation.
Sen. Amy Klobuchar, D-Minn., said the Army was working with the NTSB in a positive way, noting that there was no finger pointing at each other during the briefing.
"I have long advocated for more air traffic controllers, but I've also advocated for a better technology, and I think that both of those things will play into the solutions," Klobuchar said.
-ABC News' Ayesha Ali
