Can res ipsa loquitur apply without expert testimony in technical negligence cases? Warenski v. Advanced RV Supply Explained

Background and Facts

In Warenski v. Advanced RV Supply, plaintiff Lane Warenski brought a negligence action against Advanced RV Supply after his ATV crashed, allegedly due to improper installation of a tie rod. Nine days after Advanced RV Supply repaired the tie rod, it became disassembled during operation, causing Warenski’s accident. When Advanced RV Supply moved for summary judgment, Warenski attempted to rely on Fred Smith’s testimony to establish both the standard of care and the elements of res ipsa loquitur. However, Warenski had designated Smith only as a fact witness, and his counsel gave a sworn statement that he had “not specifically retained any expert witness in this case.”

Key Legal Issues

The central issue was whether Warenski could establish the elements of res ipsa loquitur without proper expert testimony when the technical aspects of tie rod installation and failure were beyond common knowledge. The court also addressed whether a witness can provide expert opinions without being properly designated as an expert under Rule 26(a)(3).

Court’s Analysis and Holding

The Utah Court of Appeals affirmed the grant of summary judgment. The court held that Smith’s testimony constituted expert opinion based on “scientific, technical, or other specialized knowledge” rather than fact testimony, but Warenski had failed to properly designate him as an expert witness. More importantly, the court determined that expert testimony was necessary to establish res ipsa loquitur elements because “the average person would not be knowledgeable about how a tie rod is properly installed, what dangers may result if the tie rod is not properly installed, or how a tie rod could become disconnected.” Without admissible expert testimony, Warenski could not rebut Advanced RV Supply’s expert evidence or establish that the accident would not have occurred absent negligence.

Practice Implications

This decision reinforces the critical importance of proper expert witness designation in technical negligence cases. Practitioners cannot circumvent disclosure requirements by designating an expert as a “fact witness” while attempting to elicit expert opinions. When the technical aspects of an alleged breach are beyond common knowledge, res ipsa loquitur requires expert foundation even though the doctrine typically relies on common experience. The case also demonstrates that summary judgment is appropriate in negligence cases when plaintiffs cannot establish essential elements, even though such cases typically present jury questions.