I’m sorry but this OSS wrong on so many levels.
This aircraft is 9 years old. It is a B737-800. Boeing’s responsibility ended when it was delivered. Southwest are responsible for all maintenance and inspection since then.
There is only one manufacturer of engines for the 737NG type, CFM. The engine itself may go back to them for maintenance as they do run overhaul shops. But they are extremely reliable engines. And this engine didn’t fail, the panels came off.
This is not an engine failure. This is more likely some poor young fella forgot to clip the cowlings shut after preflight checks.
Does this guy shout “IT’S WESSEL-BERG!!” every time someone calls him weasel-berg?