As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING AN AVIONIC TEST FLIGHT THE TAIL ROTOR PEDAL LOCKOUT EXPANDABLE PIN FELL APART FROM THE PIN HANDLE. THERE ARE NO INSTRUCTION TO IDENTIFY THIS ISSUE IN THE INSTALLATION INSTRUCTION. (IIN-D119-827). THIS COULD HAVE BEEN A CATASTROPHIC.