What immediate action follows a critical Soyuz in-flight failure, such as the MS-10 event?

Answer

The fleet is grounded for investigation and testing

The subsequent grounding of the rocket family following the MS-10 abort allowed engineers to conduct exhaustive tests on the affected components across all ready-to-fly vehicles.

What immediate action follows a critical Soyuz in-flight failure, such as the MS-10 event?
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