Boeing is now pushing for US aerospace regulators to offer breathing room to the Boeing 777 Freighter when it comes to emissions standards, as the long-delayed Boeing 777-8F’s certification and service entry continue to slip backwards. In a petition to the Federal Aviation Administration (FAA), the company is looking for an emissions-related waiver that would allow it to sell 35 additional Boeing 777F aircraft that otherwise would face a certification cutoff that is tied to the latest set of fuel efficiency standards.