Kurns v. Railroad Friction Products Corp.
The Court ruled that a federal railroad safety law from 1911, the Locomotive Inspection Act, blocks state-law lawsuits over the design and safety warnings of locomotive equipment, including a widow's claims that asbestos brakeshoes caused her husband's fatal cancer.
Because a 1926 precedent had already said this law claims the entire field of regulating locomotive equipment, the Court held both the design-defect and failure-to-warn claims out of bounds, leaving asbestos-exposed workers and their families without a state-law remedy for these kinds of injuries.
“The federal and the state statutes are directed to the same subject—the equipment of locomotives.”
Quoting Napier to explain why the state-law claims fall within the pre-empted field.
How it got here: A federal trial court granted summary judgment for the equipment makers on pre-emption grounds; the Third Circuit affirmed, and the Supreme Court agreed to review that ruling.
The Case in Depth
What happened
George Corson worked as a welder and machinist on a railroad from 1947 to 1974, handling locomotive brakeshoes and insulation containing asbestos. Decades later he was diagnosed with mesothelioma. He and his wife sued the companies that made and distributed the asbestos-containing locomotive parts, claiming the parts were defectively designed and that the companies failed to warn him of the dangers. Corson died during the litigation, and the executrix of his estate continued the suit.
The question before the Court
Could a railroad worker's family sue a parts maker under state law for asbestos in locomotive brakeshoes, or did a 1911 federal locomotive safety law block those claims?
The Court's answer
No — the Court ruled that both types of claims are blocked. A 1911 federal law, the Locomotive Inspection Act, was interpreted decades ago in Napier v. Atlantic Coast Line R. Co. to give the federal government exclusive control over regulating the physical equipment of locomotives, including its design, construction, and materials. Because both the design-defect claims and the failure-to-warn claims were aimed at that same subject—the safety of locomotive equipment—the Court held that neither could go forward under state law, regardless of whether any federal rule actually addressed asbestos specifically.
The Court rejected several arguments for narrowing this rule, including that the claims arose from repair work rather than on-track use, that failure-to-warn claims are conceptually different from design claims, and that the manufacturers weren't directly regulated at the time. Two Justices wrote separately to express discomfort with how broadly the old precedent reached, and three Justices would have allowed the failure-to-warn claims to proceed.
Curious how the Court got there? See the step-by-step legal reasoning →
Why it matters
Railroad workers and their families who developed diseases from asbestos-containing locomotive parts cannot sue equipment makers under state tort law for defective design or failure to warn, even though no federal regulation specifically addressed asbestos. The ruling channels all such disputes into the narrow, and in this context largely absent, framework of federal locomotive-equipment rules, leaving many injured workers without any avenue for compensation.
What changes now
This is a final merits decision resolving the pre-emption question; it does not remand for further proceedings on the merits because the lower courts' grant of summary judgment against the plaintiffs is affirmed. The ruling forecloses similar state-law tort suits over locomotive equipment design or warnings nationwide unless Congress or the Court later revisits the scope of the Locomotive Inspection Act's pre-emptive field, an outcome two Justices suggested might be warranted in a future case.
What this does not decide
The decision does not revisit or overrule the 1926 Napier precedent itself—both the majority and concurrence note the parties did not ask for that—and it does not address whether locomotive-equipment pre-emption would extend differently if the underlying agency had actually regulated asbestos or repair-related hazards.
Concurrences and dissents
Concurrence — Justice Kagan
Justice Kagan agreed that both the design-defect and failure-to-warn claims are pre-empted, but wrote separately to note she doubts the Court would decide Napier the same way under modern pre-emption doctrine, which requires much clearer evidence that Congress meant to displace all state law in a field. She reasoned that because the agency could have banned the brakeshoes outright, it necessarily also had the lesser power to require warnings about them, so both claims fail under Napier's test.
Dissent in part — Justice Sotomayor
Justice Sotomayor agreed the design-defect claims are pre-empted but would have allowed the failure-to-warn claims to proceed, arguing they rest on a fundamentally different theory that does not require any change to a locomotive's physical design. She contended that only state laws with a direct and substantial effect on regulated equipment are pre-empted, that a mere 'influence' on design choices is not enough, and that the responsible federal agency has never claimed authority over repair-related warnings.
How the Court got there
The legal reasoning, step by step
- The Court applied the rule from its 1926 decision Napier v. Atlantic Coast Line R. Co., which held that the Locomotive Inspection Act (LIA) occupies the entire field of regulating locomotive equipment, meaning no state law—legislative or common-law—can operate on that same subject matter regardless of its purpose.
- The Court explained that Napier defines the pre-empted field by the physical elements regulated (the design, construction, and materials of locomotive parts), not by the specific hazard targeted, the entity being regulated, or whether a federal rule actually addresses the danger at issue.
- The Court considered whether a later statute, the Federal Railroad Safety Act of 1970, narrowed the LIA's pre-emptive reach, and concluded it did not because that Act only fills in additional areas of railroad safety without altering pre-existing statutes like the LIA.
- Applying Napier's test, the Court found that both defective-design claims and failure-to-warn claims are 'directed at' the equipment of locomotives, because a warning-based claim still asserts that the product itself is unsafe unless the warning accompanies it.
- The Court rejected arguments that the pre-empted field should be limited to claims arising from a locomotive's on-line use (rather than repair) or to entities actually regulated under the LIA at the relevant time, since Napier drew the line based on the physical subject regulated, not on these other distinctions.
- Concluding that both types of claims fell within the field Napier had already marked off as exclusively federal, the Court held that ordinary common-law tort duties directed at locomotive equipment are pre-empted alongside state statutes or regulations.
Doctrinal impact
Cases affected by this decision
Reaffirms Napier v. Atlantic Coast Line R. Co. (272 U.S. 605)
The Court relied on this 1926 case's definition of the field pre-empted by the locomotive safety law and applied it to bar the new claims.