The Federal Aviation Administration (FAA) and the Occupational Safety and Health Administration (OSHA) have once again teamed up to coordinate efforts in enforcing a federal air carrier safety law. These agencies recently released a Memorandum of Understanding (MOU), the purpose of which “is to facilitate coordination and cooperation concerning the protection of employees who provide air safety information under . . . 49 U.S.C. § 42121,” the whistleblower protection provision of the Wendell H. Ford Aviation Investment and Reform Act for the 21st Century (AIR-21).  This agreement replaces a previous MOU between the agencies dated March 22, 2002, but the agencies’ other previous MOU, from August 26, 2014, remains intact.