Quality Control Review on a Single Audit of the Wayne County Airport Authority, Detroit, MI

What We Looked AtWe performed a quality control review (QCR) on the single audit that Plante & Moran, PLLC performed for the Wayne County Airport Authority’s (WCAA) fiscal year that ended December 31, 2022. During this period, WCAA expended approximately $75.4 million from U.S. Department of Transportation (DOT) programs. Plante & Moran determined that DOT’s major program was the Federal Aviation Administration’s Airport Improvement Program. Our QCR objectives were to determine whether (1) Plante & Moran’s audit work complied with the Single Audit Act of 1984, as amended, the Office of Management and Budget’s Uniform Guidance, and the extent to which we could rely on the auditor’s work on DOT’s major program and (2) WCAA’s reporting package complied with the reporting requirements of the Uniform Guidance.What We FoundPlante & Moran complied with the requirements of the Single Audit Act, the Uniform Guidance, and DOT’s major program. We found nothing to indicate that Plante & Moran’s opinion on DOT’s major program was inappropriate or unreliable. However, we identified deficiencies in Plante & Moran’s audit work that require correction in future audits. Accordingly, we assigned Plante & Moran a rating of pass with deficiencies.