What was found
(CAN) BATTERY VENT CAPS WILL NOT REMAIN TIGHT DUE TO CAP THREADS POORLY MADE. THE THREADS SEEM TO BE TOO SMALL AND WOULD NOT ENGAGE THE CELL COVERS ENOUGH TO STAY TIGHTSEVERAL OTHER AIRCRAFT CHECKED WITH SAME BATTERY MAKE AND HAVE THE SAME PROBLEM. EACH CAP HAS RUBBER CAP CONNECTED TO A VENT MANIFOLD THAT VENTS OVERBOARD. WHEN THE BATTERY CAP COMES LOOSE IN THE THREADS IN THE BATTERY, FLUID CAN SPILL OUT.