GAO examined the underlying records for the net excise tax revenue distributed to the Airport and Airway Trust Fund (AATF) for fiscal year 2001. GAO (1) did a detailed test of transactions that represent the underlying basis of amounts distributed to AATF, (2) reviewed the Internal Revenue Service's (IRS) quarterly AATF certifications, (3) reviewed the Department of the Treasury Financial Management Service adjustments to AATF for fiscal year 2001, (4) reviewed procedures in the Office of Tax Analysis' process for estimating amounts to be distributed to AATF for the fourth quarter of fiscal year 2001, (5) compared net excise tax distributions to AATF during fiscal year 2001 and amounts reported in the financial statements prepared by the Bureau of the Public Debt for AATF and the Federal Aviation Administration's consolidated financial statements, and (6) reviewed key reconciliations of IRS records to Treasury records.

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