The US Federal Aviation Authority (FAA) has said it will not suspend Boeing 737 Max aircraft despite mounting pressure from senators and workers’ unions.
The FAA said a review showed “no systemic performance issues” and there is no basis for grounding the aircraft.
An Ethiopian Airlines plane crashed on Sunday killing all 157 people on board, in the second fatal accident involving the 737 Max 8 model in five months.
A wave of countries and blocs have banned the plane from their airspace.
They include the UK, China, the European Union and Australia.
Ted Cruz, a Republican senator who chairs a subcommittee on aviation and space, said: “I believe it would be prudent for the US likewise to temporarily ground 737 Max aircraft until the FAA confirms the safety of these aircraft and their passengers.”