As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NR 1 ENGINE BETA LOCKOUT FAILURE AT 500 FT, ENGINE OSCILLATED AT 1000 PROP RPM, TORQUE REACHED 112 PERCENT FOR 1 SECOND (CREW RETARDED THE CONDITION LEVER AND PROP RPM DROPPED TO 900 OSCILLATION STOPPED) CONSULTED MM AND ENGINE PROGRAM MAN. DETERMINED AC DID NOT EXCEED LIMITS. DEACTIVATED BETA LOCKOUT SYSTEM IAW WITH MEL. C/W WORK CARD 61-20-10 AND GROUND RUN FOUND NO DEFECTS NOTED CLEAR MEL.