Here the plaintiffs filed suit against the airline and the steward.
Virtually all liability policies exclude coverage for intentional acts. Sex abuse cases (dentists using laughing gas) are one of the categories where this exclusion becomes relevant. Typically, plaintiff's counsel gets around this exclusion by alleging the defendant negligently or intentionally committed harmful actions. I don't know how the claims are pleaded in this action.
Some liability policies provide coverage for the actions of employees (typically acting within the course and scope of their employment).
Suing both the airline and the steward is interesting, because the steward's assets likely are wholly inadequate to cover the damages. Moreover, there is very likely a conflict of interest between the steward and the airline and maybe between the airline and its insurer.
Questions:
Is the steward an insured under AA's insurance?
Who is paying for the steward's defense?
Who is representing the airline and the steward?
Insurers sometimes play hardball with insurance coverage in sex abuses cases, and expect insureds to contribute to settlement.
But, we'll never know who funds the settlement. There will be a confidentiality provision.