US to probe certain Boeing 777s as Japan grounds some of the jets

US orders extra scrutiny of Boeing 777s with same type of engine that failed on United Airlines flight forcing return to Denver airport on Saturday.

United States aviation regulators announced extra inspections of Boeing Co’s 777 jets using the same type of engine that shed debris over Denver on Saturday, while Japan went further and suspended their use while it considers what action to take. The regulatory moves involving planes with Pratt & Whitney 4000 engines came after a United Airlines 777 returned safely to Denver International Airport on Saturday after its right engine failed. The incident on United Airlines Flight 328 from Denver to Honolulu took place shortly after it took off with 231 passengers and 10 crew members. The plane landed safely back in Denver.