TRAILER HITCHS:FIFTHREESE 16000 FIFTH WHEEL HITCH MAY HAVE A DEFECT IN DESIGN THAT ALLOWS SAFETY PIN TO FALL OUT. WITHOUT A SAFETY PIN, THE MAIN LOAD-BEARING PIN CAN THEN SLIDE OUT CAUSING THE RV TO BECOME DISCONNECTED FROM THE TOWING VEHICLE. THE PIN FELL OUT ON TWO RECENT OCCASIONS ON MY HITCH.*AK