49 C.F.R. § 234.109 – Recordkeeping.

(a) Each railroad shall keep records pertaining to compliance with this subpart. Records may be kept on forms provided by the railroad or by electronic means. Each railroad shall keep the following information for each credible report of warning system malfunction:
1. (1) Location of crossing (by highway name and DOT/AAR Crossing Inventory Number);
2. (2) Time and date of receipt by railroad of report of malfunction;
3. (3) Actions taken by railroad prior to repair and reactivation of repaired system; and
4. (4) Time and date of repair.
(b) Each railroad shall retain for at least one year (from the latest date of railroad activity in response to a credible report of malfunction) all records referred to in paragraph (a) of this section. Records required to be kept shall be made available to FRA as provided by 49 U.S.C. 20107 (formerly 208 of the Federal Railroad Safety Act of 1970 (45 U.S.C. 437)).