Even before the first question; what was briefed, what was the plan, what information did the crew have about the conditions, what was considered in the decision to land, what performance information was supplied?
Could this be an example where FAA advice to use a minimum factor of 1.15 for the pre landing check provides insufficient distance margin for inaccurate runway condition information?
TAG, I hope that pilots consider aquaplaning a ‘hazard’ requiring ‘what-if’ forethought and mitigation, opposed to considering it as a braking problem or failure.
Similarly failure of reverse, if not used in the certificated landing distance, should not contribute to this result.