Tensions were running high. One of Boeing’s new jets — hailed by the company as an even more reliable version of Boeing’s stalwart 737 — had crashed into the ocean off Indonesia shortly after takeoff, killing all 189 people on board the flight operated by Lion Air.

After the crash, Boeing issued a bulletin disclosing that this line of planes, known as the 737 Max 8, was equipped with a new type of software as part of the plane’s automated functions. Some pilots were furious that they were not told about the new software when the plane was unveiled.

Dennis Tajer, a 737 captain who attended the meeting with Boeing executives, recalled, “They said, ‘Look, we didn’t include it because we have a lot of people flying on this and we didn’t want to inundate you with information.’ ”

“I’m certain I did say, ‘Well that’s not acceptable,’ ” said Tajer, a leader in the association representing American Airlines pilots.