of an incident involving an oil and hydraulic fluid event onboard aircraft in which at least 1 passenger or crew member required medical attention as a result of the incident. (4) Installation onboard aircraft of detectors and other air quality monitoring equipment situated in the air supply system to enable pilots and maintenance technicians to locate the sources of air supply contamination, including carbon monoxide. 337. Airport air safety The Administrator shall evaluate whether there are impacts to travelers due to poor air quality and bleed air inside Washington Dulles International Airport. 338. Aircraft interchange agreement limitations (a) In general Not later than 6 months after the date of enactment of this section, the Administrator shall revise section 121.569 of title 14, Code of Federal Regulations, to include each of the provisions described in subsection (b). (b) Provisions described The provisions described in this subsection are the following: (1) A 30-day limit on foreign aircraft interchange agreements. (2) A minimum break between foreign aircraft interchange renewals of 90 days. (3) A limit of no more than 1 foreign aircraft interchange agreement between 2 airlines. (4) A limit of no more than 2 foreign aircraft on the interchange agreement. 339. Wildfire suppression (a) In general To ensure that sufficient firefighting resources are available to suppress wildfires and protect public safety and property, and notwithstanding any other provision of law or agency regulation, not later than 18 months after the date of enactment of this section, the Administrator shall promulgate an interim final rule under which— (1) an operation described in section 21.25(b)(7) of title 14, Code of Federal Regulations, shall allow for the transport of firefighters to and from the site of a wildfire to perform ground wildfire suppression and designate the firefighters conducting such an operation as essential crewmembers on board a covered aircraft operated on a mission to suppress wildfire