EASA issued
AD 2018-0071 on 26 March 2018 following the first incident of loss of fan blade. It says:
Reason:
An occurrence was reported of fan blade failure on a CFM56-7B engine. The released fan blade was initially contained by the engine case, but there was subsequent uncontained forward release of debris and separation of the inlet cowl. Preliminary investigation determined that the fracture in the blade initiated from the fan blade dovetail.
This condition, if not detected and corrected, could lead to fan blade failure, possibly resulting in uncontained forward release of debris, with consequent damage to the engine and the aeroplane.
To address this potential unsafe condition, CFM International issued CFM56-7B SB No. 72-1019, later revised, and CFM56-7B SB No. 72-1024, providing inspection instructions.
For the reason described above, this AD requires a one-time inspection of certain fan blades, and, depending on findings, accomplishment of applicable corrective action(s).
This AD is considered an interim action and further AD action may follow.
It is interesting that the FAA have not yet issued an AD on the same subject, despite a
Notice of proposed rulemaking (NPRM) being issued covering the same issue on 25 August 2017.
Maybe they are now speeding up the AD process, as stated
here