In the 1985 case Eastern Air Lines, Inc. v. Mahfoud on behalf of Mahfoud et al., the US Supreme Court ruled in favor of Eastern Air Lines (EAL). The dispute arose when EAL terminated its contract with a travel agency owned by George and Mary Ann Mahfoud due to alleged fraudulent activities. The agency sued for breach of contract and defamation, but lost at trial court level as it was found that they had indeed committed fraud against EAL through unauthorized ticket sales. On appeal, however, the Fourth Circuit reversed this decision arguing that federal law did not preempt state law claims regarding airline ticket sales practices. The Supreme Court disagreed with this view stating that such issues were within exclusive federal jurisdiction under the Federal Aviation Act which aimed to ensure uniformity in regulation across states for air carriers' rates, routes and services. Therefore, state laws could not be used to regulate these aspects or provide remedies for disputes arising from them - including those related to deceptive trade practices like unauthorized ticket selling by agencies.

In the dissenting opinion for Eastern Air Lines, Inc. v. Mahfoud on behalf of Mahfoud et al., 1985, it was argued that the majority's decision to allow a private right of action under Section 1114(l) (1) of the Federal Aviation Act is inconsistent with both legislative intent and precedent. The dissent pointed out that Congress did not explicitly provide for such a right in this section nor anywhere else in the act, suggesting they didn't intend one to exist. Furthermore, previous court decisions have consistently held that implied rights should only be recognized when necessary to fulfill clear congressional objectives - which isn't evident here as there are other remedies available within FAA regulations themselves or through common law tort claims against airlines for damages caused by violations of safety standards. Thus, creating an additional remedy seems unnecessary and potentially disruptive to established legal frameworks governing aviation safety.