What was found
(CAN) WE RECENTLY BOUGHT AND INSTALLED THE DART TAIL ROTOR PEDAL LOCK OUT KIT IN OUR BELL 206L AND 407.. YESTERDAY, IN FLIGHT THE PASSENGER TOUCHED THE AFT END OF THE ROD (FIG 3.2 OF DART INN-D119-827) AND IT POPPED OF THE LOCK PIN ALLOWING THE PEDAL TO FALL FORWARD AND POTENTIALLY JAM THE TAIL ROTOR CONTROLS. THE PASSENGER HAD TO REMOVE HIS SEATBELT AND REACHED FORWARD AND PULL THE PEDAL BACK AND ENGAGE IT AGAIN. I INSPECTED THE LOCKING PIN WHEN THE HELICOPTER RETURNED TO BASE AND FOUND IT FAILED TO LOCK EVERY TIME IT WAS TESTED. WE HAVE REMOVED BOTH KITS FROM OUR AIRCRAFT. (TC# 20190704013)