As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIVE B-3493 START LOCK BRACKETS WERE FOUND DURING PENETRANT INSPECTION TO BE CRACKED AT THE SAME LOCATION. CRACKS ARE LOCATED ON THE EXTERIOR START PIN BORE NEXT TO THE SPINNER MOUNTING BOLT RELIEF CUT-OUT. THIS BRACKET IS PART OF THE 830-34L START LOCK UNIT INSTALLED ON 4-BLADED MU-2S.