U.S. auto safety regulators have "tentatively concluded" that Fiat Chrysler Automobiles NV did not adequately remedy safety defects in a timely manner, notify car owners of recalls or keep federal officials informed about ongoing issues, according to an official document seen by Reuters on Wednesday. The document, an official draft of a notice to be published in the Federal Register, contains the most strongly worded language to date by regulators at the National Highway Traffic Safety Administration and expands from 20 to 22 the number of recalls that NHTSA intends to scrutinize at a public hearing on July 2.