2018-09-51: Engine

Emergency order 2018-09-51 is an airworthiness directive. The FAA's subject line: Engine. It names the CFM International CFM56-7B20, CFM International CFM56-7B22, CFM International CFM56-7B24, CFM International CFM56-7B24/3, CFM International CFM56-7B24E, CFM International CFM56-7B26, CFM International CFM56-7B26/2, CFM International CFM56-7B26/3, CFM International CFM56-7B26/B1, CFM International CFM56-7B26E, CFM International CFM56-7B27, CFM International CFM56-7B27/3, CFM International CFM56-7B27/B1, CFM International CFM56-7B27/B3, CFM International CFM56-7B27A, CFM International CFM56-7B27AE, CFM International CFM56-7B27E, CFM International CFM56-7B27E/F, CFM International CFM56-7B27EB3, CFM International CFM56 series engines: about 1,878 aircraft on the U.S. register today across them, though an order usually covers particular versions or serial numbers rather than every one. System: engine.