11. Accrued Warranty Reserve

The Company provides for the estimated costs of warranties at the time revenue is recognized. The specific terms and conditions of those warranties vary depending upon the microturbine product sold and the geography of sale. The Company’s product warranties generally start from the delivery date and continue for up to twenty-four months. Factors that affect the Company’s warranty obligation include product failure rates, anticipated hours of product operations and costs of repair or replacement in correcting product failures. These factors are estimates that may change based on new information that becomes available each period. Similarly, the Company also accrues the estimated costs to address reliability repairs on products no longer in warranty when, in the Company’s judgment, and in accordance with a specific plan developed by the Company, it is prudent to provide such repairs. The Company assesses the adequacy of recorded warranty liabilities quarterly and makes adjustments to the liability as necessary. When the Company has sufficient evidence that product changes are altering the historical failure occurrence rates, the impact of such changes is then taken into account in estimating future warranty liabilities. Changes in the accrued warranty reserve during the six months ended September 30, 2022 are as follows (in thousands):

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During the fourth quarter of Fiscal 2021, the Company recorded a specific $4.9 million accrual related to a reliability repair program to account for the replacement of remaining high risk failure parts in some of the Company’s fielded units due to a supplier defect. As of September 30, 2022, the accrual related to this reliability repair program was zero as the Company has determined it replaced a sufficient quantity of high risk failure parts in its fielded units under this reliability repair program and that it should be terminated.