A supplier taught the equipment, not the hazards - the split that decided the case
A fatal workplace fire killed two workers - but a federal appeals court ruled the vendor that trained them owed no safety duty.
The US Army's Letterkenny Army Depot in Pennsylvania runs a paint-mixing room where workers transfer paint and thinner from 55-gallon drums into a mixing carousel. To upgrade the pumps, the Depot brought in a contractor, Finishing Systems, whose subcontractor bought them from the manufacturer, Carlisle Fluid Technologies. Carlisle agreed to install the pumps and train workers on the "correct use, care and maintenance of the equipment."
A Carlisle trainer spent between half an hour and two hours with the crew. He showed them how to start the pumps, read the pressure gauges and adjust pressures. What he did not cover was safety. Paint thinner is highly flammable, and safety rules call for fire-resistant, anti-static clothing to stop sparks. According to the court, there was no evidence the trainer raised any of that.
Two months later, workers went to swap out an empty drum of thinner. They wore ordinary street clothes, not anti-static gear. One opened the drum, releasing leftover vapors, and a static discharge set off a fire that killed two employees and severely burned a third.
The survivors and the two estates sued nearly two dozen defendants. By the time it reached the US Court of Appeals for the Third Circuit, only a few claims against Carlisle remained: negligence, negligent infliction of emotional distress and wrongful death. On July 20, 2026, the court affirmed summary judgment for Carlisle, holding that it owed the workers no duty of care.
Under Pennsylvania law, a company performing a service can owe a duty to people hurt by careless work, but only as far as its job went. Carlisle agreed to sell, install and give basic operational training. It never agreed to run full safety training, even though plaintiffs argued it had "superior knowledge" of the hazards. So it had no broader duty.
The court was clear on where that duty sat. "The Depot may have owed its workers a duty to train them," it wrote, an obligation the employer could not hand to an equipment vendor just because it showed them how to run the machines.
For HR, the signal is direct: a supplier's operational training is not safety training and does not shift the employer's duty.
The ruling turned on legal duty, not on whether Carlisle was careless; finding no duty, the court never reached that question. The decision is a slip opinion and may face further review.
