The high priority probes comes in the wake of yet another crash of a Boeing aircraft in Indonesia.

Following the crash of a Lion Air jet in Indonesia last month, the U.S. Federal Aviation Administration has launched a high-priority probe of the safety analyses performed over the years by Boeing Co.

The regulator has stated, it is reviewing the details revolving around the safety data and conclusions Boeing had previously provided to it as part of certifying 737 MAX 8 and MAX 9 models, said the WSJ in a report.

“As we have previously said, we have issued an (airworthiness directive) and will continue to take appropriate action based on what we learn from the investigation. This has not changed,” said the FAA.

Boeing and the FAA are continuing to evaluate the need for design changes, including software changes, to the aircraft which includes operating procedures and training, as they delve deeper into the ongoing investigation, said the FAA.

Boeing did not respond to requests for comment outside regular business hours.

On October 29, minutes after taking off, a Lion Air Boeing 737 MAX 8 crashed into the sea killing all 189 people on board.