Why was the removal of the case to federal court denied for the manufacturer involved with an airline?

The removal of a case from state court to federal court is subject to specific procedural requirements, one of which involves the need for all defendants to consent to the removal if there are multiple defendants. In situations where a case is removed based on diversity jurisdiction, the unanimity rule requires that all defendants who have been properly joined in the lawsuit must agree to the removal to federal court. If any defendant does not consent, the removal will be denied.

In this scenario, the failure to obtain consent for removal indicates that at least one of the defendants involved in the case did not agree to the removal to federal court. This lack of unanimous consent is a critical aspect of federal removal procedures, and under such circumstances, the federal court lacks jurisdiction to hear the case.

The other possible reasons—insufficient grounds for diversity jurisdiction, a lawsuit filed in the wrong venue, and claims not being related—are pertinent to jurisdictional and procedural issues but do not specifically address the unanimous consent requirement necessary for removal. Therefore, the correct reasoning revolves around the procedural necessity of obtaining consent from all defendants involved in the case.