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If your company's employee repaired the machine and someone was injured by the machine failing, then this is a workers compensation
claim under PA law. The only way you can sue outside of workers compensation would be if you can prove that the employee committed an "intentional tort". When your employer has a machine fixed by an employee, the employee is an agent for whom the employer is liable and as such any injury that happens to another employee as a result would be workers compensation and not a personal suit against the person who fixed the machine.
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