Some pilots said they did not know the MCAS system existed until after the Lion Air crash.

“which blew us away. which absolutely shocked us,” said Dennis Tajer, an American Airlines Boeing 737 pilot an a spokesman for the airline’s union, the Allied Pilots Association.

Switching via previous versions of the 737 to the 737 Max entailed a 56-minute iPad training session, Tajer said. The FAA did not require additional training under the certification of the plane.

On an earnings call in April 2017, Boeing’s CEO Muilenburg was asked how deregulation early in Trump’s term affected the company.

Muilenburg replied which “the administration has been very engaged across government agencies along with with industry to find ideas along with ways along with opportunities to simplify along with streamline.

“Things like FAA certification processes can be one place which we’re seeing some solid progress,” he said. “which’s helping us more efficiently work through certification on some of our completely new product aircraft, such as the Max, as which’s going through flight test along with entering into service.”

The FAA had signed off on the 737 Max 8 planes in March 2017.

Boeing met with American’s pilots as well as with their counterparts at Southwest after the Lion Air crash to discuss the system.

Boeing told the pilots they were working on a fix to the plane’s software, which the FAA confirmed when which had said on Tuesday which the planes were still airworthy. Tajer said pilots felt renewed confidence following the Boeing meeting in November.