Based on the original service request by Paul the rear system inspection appears to be in 100% good functioning condition at this time no evidence of water in, on, or around the equipment, in either of the overflow drain safety pans, on the floor of the second floor or the ceiling of the first floor. Diagnostics of the second system, The 8 ton American standard front of the building cooling only equipment initially did not discover any water or flooded drains until the occupant of the office below the front system was discovered cleaning flood damage. Running tests and drain inspections discovers a 100% blockage of the 1.5" "house” drain spanning 20 to 30 ft across the drop panel ceiling of the first floor associated with the American standard second floor air handler. Glued and primed fittings are falling apart at the air handler and the horizontal drain does not meet national code for proper fall and drainage causing bellies and low spots holding sludge and debris Reattached the b