As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED LYCOMING FACTORY REBUILT ENGINE IAW PIPER PA-46-310/350 MM 71-00-00, PG 19-22(A) (8). SECURED ENGINE CONTROL WITH SELF-LOCKING NUTS PER PIPER PRACTICES. AFTER LANDING, ON FIRST FLIGHT, THROTTLE CONTROL WAS LOST DUE TO LOSS OF HARDWARE AT THROTTLE TO INJECTOR CONTROL. MS20365-1032C SELF-LOCKING NUT BACKED OFF AND LOST. CASTLE NUT/COTTER KEY AND BOLT INSTALLED ON THROTTLE, MIXTURE AND PROPELLER GOVERNOR. (X)