As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER EXCURSION DURING APPLICATION. POST POWER ON AUTO ROTATION FLARE. TORQUE APPLIED THROUGH 40% FROM 0 AT WHICH POINT TORQUE VARIED 40%-70 &-45%-60% WITH 0 COLLECTIVE MOVEMENT. ACFT YAWED RT & LT TWICE. ALL OTHER ENG INDICATIONS WITHIN NORMAL LIMITS. EVENT HAPPENED WITH CALM WINDS. AFTER EVENT, MX FOUND THE LINEAR ACTUATOR TO BE INOPERATIVE.