Even though wall cracks tend to be the most frequent cause of a flooded elevator shaft (a cracked floor is far less likely, due to its depth), they are not the only ones to blame. A clogged drain or a broken sump pump are other causes of elevator shaft leakage.
The simplest, most obvious issue is a clogged drain - just get it cleaned, and problem solved. However, it can get more complicated if the slope of the drain is reversed for some reason.
Broken Sump Pumps
A sump pump is great when it works… That’s not always the case, though. On occasions, it is the improperly working (or a completely broken) sump pump that causes flooding in the elevator pit. If there is leakage that doesn’t get drained away with this pump, standing water is the result. This, in turn, will cause further damage - the elevator equipment will rust and end up leading to elevator shutdown, if no action is taken.
No need to get to such a drastic scenario - properly working drainage and sump pump can be the simple solution (if there is no issue with the elevator shaft walls).