Workers walk near a Boeing 737 MAX 8 being built for for Ethiopian Airlines on March 11. Airlines in several countries grounded the same model jetliner following a deadly crash in Ethiopia. | AP Photo/Ted S. Warren Transportation Trump's FAA increasingly isolated as other countries ban Boeing jet Boeing's CEO spoke with Trump by phone on Tuesday morning.

The Federal Aviation Administration refused again Tuesday evening to ground Boeing’s beleaguered 737 MAX 8 jetliner, despite pleas from lawmakers of both parties who said the U.S. should join a growing list of governments that have barred the plane amid questions about two deadly air crashes.

The FAA's action avoided the major disruptions that could occur if regulators were to sideline a plane that's important to the operations of some domestic airlines and a moneymaker for one of the nation’s top manufacturers. But it left the agency increasingly isolated amid pressure from members of Congress, labor unions and dozens of countries and foreign-based airlines responding to Sunday's disaster in Ethiopia and an apparently similar crash last fall in Indonesia.


"Thus far, our review shows no systemic performance issues and provides no basis to order grounding the aircraft," acting FAA Administrator Dan Elwell said in a statement just after 6 p.m. "Nor have other civil aviation authorities provided data to us that would warrant action."

Elwell promised that "the FAA will take immediate and appropriate action" if such evidence emerges.

The statement came hours after President Donald Trump spoke by phone with Boeing CEO Dennis Muilenburg, who assured him that the 737 MAX is safe. An administration official later said the White House has been in "constant contact" with the FAA about the issue.

Sunday's Ethiopian Airlines crash killed 157 people, including eight Americans. Though the cause of the crash has not been determined, it bears similarities to an October air disaster in Indonesia in which 189 people died, raising questions about whether a Boeing stall-prevention system on the MAX 8 sent the plane into a fatal dive just after takeoff.

Six years ago, the Obama administration's FAA had ordered the temporary grounding of another Boeing plane — the 787 Dreamliner — amid questions about a spate of fires linked to its lithium ion batteries.

Sens. Elizabeth Warren (D-Mass.) and Mitt Romney (R-Utah) said Tuesday that the FAA shouldn’t wait for answers before taking the MAX 8 out of service — echoing similar statements Monday from Sens. Richard Blumenthal (D-Conn.) and Dianne Feinstein (D-Calif.).

"Today, immediately, the FAA needs to get these planes out of the sky," Warren said Tuesday. She also called for congressional hearings on "whether an administration that famously refused to stand up to Saudi Arabia to protect Boeing arms sales has once again put lives at risk for the same reason."

Meanwhile, the European Union, the United Kingdom, Ireland, France and Germany became the latest governments Tuesday to jump into the fray, barring 737 MAX planes from their airspace. They joined a flood of other nations that have barred the Boeing jet, including China, Australia, Malaysia, Oman and Singapore, as well as airlines based in countries such as Mexico, Norway and South Korea.

Seven British, seven French, five German and one Irish citizen were among those killed in the Ethiopian Airlines crash.

The cascade of groundings represents a break from decades of other countries largely following the FAA’s lead on the safety of U.S. aircraft. It comes just two years after the global aviation industry registered its safest year ever, with no passenger jet fatalities reported anywhere in the world in 2017 — a feat for which Trump claimed credit last year.

But fatal airline accidents still occur despite being far less frequent than in decades past. Last year, a Southwest Airlines passenger died after being partially sucked out a window on a Boeing 737 whose engine had fallen apart during a New York to Dallas flight.

Investigators are also trying to determine the cause of crash in February of a Boeing 767 cargo plane outside of Houston that killed all three pilots on board. An initial investigation turned up signs that the crash might have been intentional.

The crashes in Ethiopia and Indonesia bore unnerving likenesses to each other, with both involving new aircraft with experienced pilots that plunged into the earth soon after takeoff. A preliminary investigation of October’s Lion Air crash in Indonesia raised questions about a new Boeing safety feature that could have forced the plane’s nose down despite the pilots’ efforts to right its course — as well as complaints from pilots’ groups that the manufacturer failed to ensure that airlines knew about the change in technology.

Boeing and the FAA have said they’re working together on a software update, but in a bulletin Monday, they said it would not be implemented until April.

Trump weighed in Tuesday with a complaint on Twitter that "airplanes are becoming far too complex to fly" — echoing a debate within some aviation circles about a growing reliance on autopilot technology and its impact on pilots. He added that "the complexity creates danger. ... I don’t know about you, but I don’t want Albert Einstein to be my pilot."

But the White House did not take a stand on whether the FAA should order the 737 MAX grounded. "We are going to be in constant contact through the Department of Transportation, the FAA, to make determinations at the appropriate time," press secretary Sarah Huckabee Sanders told Fox News on Tuesday.

Transportation Secretary Elaine Chao said Monday that her agency is "very concerned ... and we're monitoring the situation very carefully."

"I want people to be assured that we take these accidents very seriously,” she said.

The FAA is so far sticking to its position that it’s too soon to declare the plane unsafe to fly. “[T]his investigation has just begun and to date we have not been provided data to draw any conclusions or take any actions," the agency said in a notice Monday.

Some lawmakers were standing by the FAA's position.

"I just think we need to have the facts and the evidence in," said Sen. John Thune (R-S.D.), a former chairman of the Senate committee that oversees air travel. He added, "I think the FAA is trying to move forward in a way that's deliberative and get into a place where they can make a decision about that."

The MAX 8 is a variation on the 737, the most widely sold jetliner in the world, and is a significant money-maker for Boeing, with thousands of the planes on order to airlines around the world. The plane is intended to be a fuel-efficient competitor to the already more-popular Airbus A320neo, which may well pull even further ahead amid the ongoing turmoil. It’s also a significant part of the fleets of Southwest and American Airlines, which have about 60 of the Max 8 planes between them.

Boeing said Tuesday that “we have full confidence in the safety of the 737,” despite the growing number of countries abandoning its plane.

“We understand that regulatory agencies and customers have made decisions that they believe are most appropriate for their home markets,” the company added. “We’ll continue to engage with them to ensure they have the information needed to have confidence in operating their fleets.”

Southwest has said it remains "confident in the safety and airworthiness of our fleet of more than 750 Boeing aircraft," and American said it will "closely monitor the investigation via Boeing and the NTSB."

But not all employees of the airlines are feeling reassured.

The national president of a union representing American Airlines flight attendants said it has asked CEO Doug Parker to "strongly consider grounding" MAX 8 jets "until a thorough investigation can be performed."

"Our flight attendants are very concerned with the recent Ethiopian Airlines Flight 302 crash, which has raised safety concerns with the 737 MAX 8," the Association of Professional Flight Attendants' Lori Bassani said in a statement. "Many respected global carriers are grounding the planes."

Bassani added that flight attendants won't be "forced to fly if they feel unsafe."

The Transport Workers Union of America, whose 150,000 members include aircraft mechanics, baggage handlers and flight attendants, said it too was urging the grounding of the plane "in an abundance of caution" until the cause of the two crashes has been determined.

"People must always be put over profits," the union tweeted at the FAA.

Kathryn A. Wolfe, Brianna Gurciullo, Stephanie Beasley, Rebecca Morin, Andrew Restuccia and Saim Saeed contributed to this report.