 Richard Cuevas is a 40-year airline veteran. He's the latest whistleblower. He was contracted with Spirit Aerosystems to work on Boeing planes. He alleges substandard manufacturing and maintenance of the Boeing 787, including drilling and sealant issues. He says the issues could compromise power and air pressure, creating a public safety risk. He claims he was fired when he brought up the issues. Boeing says his concerns were thoroughly investigated and found not to be a safety worry. Alex Stone, ABC News.