As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INADVERTENT AUTOFEATHER AT 1200 FEET. TORQUE WENT TO 146 PERCENT ON LEFT ENGINE. RETURNED TO LAX. INSTALLED SERVICEABLE LEFT ENGINE IAW MM 71-00-00. CHANGED LEFT PROPELLER ALSO. CAUSE OF AUTOFEATHER UNKNOWN UNTIL FURTHER TEARDOWN OF COMPONENTS COMPLETED.