Section 158.87 - Loss of Federal airport grant funds(a) If the Administrator determines that revenue derived from a PFC is excessive or is not being used as approved, the Administrator may reduce the amount of funds otherwise payable to the public agency under 49 U.S.C. 47114 . Such a reduction may be made as a corrective action under § 158.83 or § 158.85 of this part.(b) The amount of the reduction under paragraph (a) of this section shall equal the excess collected, or the amount not used in accordance with this part.(c) A reduction under paragraph (a) of this section shall not constitute a withholding of approval of a grant application or the payment of funds under an approved grant within the meaning of 49 U.S.C. 47111(d) .Doc. No. 26385, 56 FR 24278, May 29, 1991, as amended by Amdt. 158-2, 65 FR 34543, May 30, 2000