Senator Dianne is demanding that the FAA ground all Boeing 737 MAX planes after last weekend's deadly crash in Ethiopia.
In a statement, the California Democrat said she doesn't want the plane in the sky until it's clear they are safe to fly.
She believes last weekend's Ethiopian Airlines crash and a crash off Indonesia last October raise important questions about whether an unknown problem exists.
The FAA is signaling to international airlines that it believes the plane is still airworthy despite the two crashes. Several countries around the world have grounded the Boeing 737 MAX since the latest crash.