You're quoting a source-less forum post, which later on is contradicted: > Not 30 times, I can name about 3 times it happened. > Thing is, it’s a known issue

You're quoting a source-less forum post, which later on is contradicted: > Not 30 times, I can name about 3 times it happened. > Thing is, it’s a known issue to the point it prompted a design change from Airbus. Why didn’t Boeing take note and change their design? Boeing are in the process of redesigning the engine cowling on the 737NG to better handle fan blade failures, but has asked for more time to "validate specific maintenance-related failure scenarios" [1] - maybe "Southwest forgot to check they're properly latched" is one of those scenarios? :-) 1: https://aviationweek.com/air-transport/safety-ops-regulation/boeing-details-cfm56-7-nacelle-inlet-cowl-redesign-effort https://aviationweek.com/air-transport/safety-ops-regulation...