...February 14, 2024 - AAR Corp. plans to acquire Triumph Group Inc.'s Product Support business, which it will fund mainly with the proceeds from new debt. - We expect credit metrics to be negatively affected by the sizable debt undertaking. However, we also expect a successful integration of the acquisition and favorable market conditions to support gradual improvement in the medium term. - Therefore, we lowered our issuer credit rating on AAR Corp. to '##' from '##+'. The outlook is stable. - We also assigned our '##' issue-level rating and '3' recovery rating (50%-70%; rounded estimate: 65%) to the company's proposed $500 million senior unsecured notes. - The stable outlook reflects our expectation that credit metrics will improve over the next two years owing to a successful integration of Triumph's Product Support business and positive market conditions that favor AAR's higher-yielding business lines. As EBITDA grows and management applies free cash flow to debt reduction, we expect leverage...