The US Federal Aviation Administration (FAA) is now approving the Boeing 737 Max aircraft again.
The aircraft was banned worldwide in March 2019 after two plane crashes.
A Lion Air plane crashed in Indonesia, killing 189 people. Five months later, an Ethiopian Airlines plane crashed.
In that crash, 157 people were killed.
American Airlines and United plan to begin operating the aircraft in December/January.
This is reported by NBC News.
