The Crew would be expected to pull the CVR CV immediately after shutting down (which renders the aircraft AOG until until a reset is authorised) and file an ASR as soon as practicable. Standard procedure in order to comply with EASA requirements would be for the airline to take both pilots off the line and then conduct a safety investigation followed by a training package appropriate to the event. I doubt very much that this crew operated the return sector and even if they did - if authorised by the Chief Pilot, they would not have flown again without a thorough debrief of the event, then a simulator check and a line check.