For one, the door plugs are installed not by Boeing but by Spirit Aerosystems. Alaska’s maintenance will be focused on that specific vendor’s performance.
Secondly, other bolts will be checked far more frequently as part of standard maintenance. Door plug fitments typically are only checked during heavy checks (which occur every few years depending on type and interval) unless there’s a specific incident that demands an immediate assessment.
Secondly, other bolts will be checked far more frequently as part of standard maintenance. Door plug fitments typically are only checked during heavy checks (which occur every few years depending on type and interval) unless there’s a specific incident that demands an immediate assessment.