FAA issues airworthiness directive on GE90 engines 

The Federal Aviation Authority has issued an airworthiness directive in relation to GE90 engines following an incident on a Thai Airways Boeing 777 in October 2019. The FAA is adopting a new airworthiness directive (AD) for all General Electric Company (GE) GE90-110B1 and GE90-115B model turbofan engines with a certain interstage high- pressure turbine (HPT) rotor seal installed. This AD requires initial and repetitive ultrasonic inspections (USIs) of the interstage HPT rotor seal and, depending on the results of the inspection, replacement of the interstage HPT rotor seal with a part eligible for installation. This AD also requires the removal