Our Objective(s)To assess the controls BTS has in place to ensure the completeness and accuracy of data for on-time performance and reported causes of delays and cancellations.Why This AuditFlight disruptions, including both flight delays and cancellations, are a part of many passengers’ experiences. Air carriers are required to submit to BTS on-time performance data—such as departure and arrival times, elapsed flight times, and minutes of delay—as well as the reported causes of any delayed or canceled flights. Accurate reporting of these data is important for the Department of Transportation (DOT) to understand the causes of delays and cancellations and take actions to protect consumers.What We FoundBTS relies on informal procedures to verify the accuracy of on-time performance data and lacks procedures to verify the data’s completeness.BTS has established informal quality control procedures to identify inaccuracies in on-time performance data submitted by reporting carriers. For example, BTS developed an automated process that performs 117automated checks of the data to identify any errors or inconsistencies.However, BTS has not yet formally adopted these procedures nor established a plan to ensure their continued execution.Although BTS requires reporting carriers to certify that the on-time performance information they submit is correct and complete, the Agency does not have a method for verifying that carriers are reporting data for all flights, raising concerns about the data’s reliability.BTS lacks effective guidance and procedures for verifying reported causes data.BTS’ technical directives, which provide guidance to carriers on reporting the causes of flight delays and cancellations, lack clarity, leading air carriers to interpret the guidance and report their data inconsistently.BTS lacks procedures to identify and address inconsistencies in reported causes data. Instead, the Agency relies on methods the air carriers are using to ensure their submitted data is accurate.We found a high rate of disagreement between data from FAA on reported causes versus the data that carriers report to BTS. BTS has not taken steps to understand and address the causes of these discrepancies.RecommendationsWe made 7 recommendations to improve the completeness and consistency of on-time performance and reported causes data.
Report Date | Agency Reviewed / Investigated | Report Title | Type | Location | |
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Department of Transportation | The Bureau of Transportation Statistics Verifies the Accuracy of Flight Delay and Cancellation Data but Can Do More To Assess Its Completeness and Consistency | Audit | Agency-Wide | View Report | |
Department of Housing and Urban Development | Timing of PHAs’ Lead-Based Paint Visual Assessments | Audit | Agency-Wide | View Report | |
U.S. Agency for International Development | Single Audit of International Foundation for Electoral Systems' Financial Statements for September 30, 2021 | Other |
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View Report | |
U.S. Agency for International Development | Single Audit of Global Communities and Related Entities for the Year Ended September 30, 2021 | Other |
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View Report | |
U.S. Agency for International Development | Financial Audit of Community-Health-Systems Strengthening Activity (CHSS) Project, Managed by BRAC, Cooperative Agreement 72038821CA00007, September 21, 2021, to June 30, 2023 | Other |
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View Report | |
U.S. Agency for International Development | Financial Audit of USAID Resources Managed by Young Women Christian Association of Rwanda Under Multiple Awards, January 1 to December 31, 2023 | Other |
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View Report | |
U.S. Agency for International Development | Financial Audit of Political Participation for Greater Electoral Integrity Project in the Philippines, Managed by Ateneo de Manila University - School of Government, Cooperative Agreement 72049220CA00007, August 1, 2020, to May 31, 2022 | Other |
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View Report | |
Federal Deposit Insurance Corporation | DOJ Press Release: Orange County Supervisor Agrees to Plead Guilty to Bribery Conspiracy Involving $10 Million in COVID Relief Funds | Investigation | Agency-Wide | View Report | |
U.S. Agency for International Development | Financial Audit of USAID Resources Managed by Hospice and Palliative Care Association of Zimbabwe Under Multiple Awards, October 1, 2022, to September 30, 2023 | Other |
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View Report | |
U.S. Postal Service | Alabama-Mississippi District: Delivery Operations | Audit |
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View Report | |