In Washington, lawmakers are calling for an investigation into the Federal Aviation Administration's approval process for the 737 Max, and it's relationship with Boeing.
All Boeing Max jets have been grounded worldwide due to safety concerns.
Boeing said it supports the grounding of its planes as a precautionary step, while reiterating "full confidence" in their safety.
President Donald Trump spoke with Ethiopian Prime Minister Abiy Ahmed to discuss the crash, Ethiopia's Fana Broadcasting Corporate reported Friday. The crash in Ethiopia was the second fatal accident involving the airplane in five months, following the October 2018 disaster in Indonesia that killed 189.
A voice from the cockpit of the Boeing 737 MAX requested to climb to 14,000 feet above sea level - about 6,400 feet above the airport - before urgently asking to return, the source told Reuters on condition of anonymity because the recording is part of an ongoing investigation.
The plane's flight data and voice recorders have arrived in France for analysis. US pilot unions said their pilots were aware of the software issue and knew how to overcome it.
BriefHamas launches two rockets from Gaza at Tel Aviv
It comes with the one-year anniversary of mass protests and clashes along the Gaza-Israel border fence approaching on March 30. The Iran-backed Al-Sabareen terrorist group in Gaza has yet to release an official statement following the rocket attacks.
And Captain Chesley "Sully" Sullenberger - noted for his safe landing of a damaged plane on the Hudson River in NY without loss of life - questioned the lack of experience of the Ethiopian first officer on the doomed flight, who reportedly had only 200 hours of flight time.
An FAA emergency order has grounded 737 MAX 8 and MAX 9 aircraft until further notice, effectively taking the aircraft out of the skies globally.
However, there have been incidents of pilots reporting that the system tipped the aircraft's nose downwards within minutes of take-off, forcing them to step in to stop the plane from dropping.
Ethiopian Airlines says their pilots received special training on the software.
Air Canada and United Airlines on Friday became the first major carriers in North America to warn of negative financial implications to business as a effect of the grounding of the Boeing planes. A separate division also provides interior systems for the Boeing 737 Max, including lavatory and oxygen systems.
Ethiopian Airlines CEO Tewolde GebreMariam said the doomed flight's captain was an experienced aviator with more than 8,000 flight hours.