Not sure that follows, either theoretically or practically. Non-reporting of any observed aircraft issues puts their fellow pilots, and all other passengers, in

Not sure that follows, either theoretically or practically. Non-reporting of any observed aircraft issues puts their fellow pilots, and all other passengers, in grave risk. A tiny shred of mutual respect for other flight crews, or for human life of passengers in general, should easily overwhelm any concern an anomaly report will harm their record. In this case, the prior crew could've reported the problem, and their successful resolution. There's little risk of an actual malfunction requiring the emergency disengagement of normal systems being mislabeled "pilot error", especially when they made a proper recovery according to trained procedures. For all I know, the crew did make this report, but the report failed to have the necessary impacts, in either grounding/fixing the plane or reminding followup crews of relevant emergency procedures. If that incident or prior failures weren't reported, or were reported but not acted upon, then the fault for that lies with some mix of the crews, the airline, and relevant regulators – in addition to any other failures by Boeing.