As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE TRYING TO LAND ON A PLATFORM IN THE GOM, PILOT REPORTED ACFT FLIGHT CONTROLS LOCKED. CONTROLS WOULD HAVE FREE TRAVEL WITH POWER APPLIED AND LEVEL FLIGHT. PILOT ELECTED TO FLY BACK TO DEPARTURE AND PERFORMED A SUCCESSFUL RUNNING LANDING. AT THIS TIME, MX IS WORKING TO FIND THE PROBLEM. WILL FILE ANOTHER MDR WHEN CAUSE HAS BEEN DETERMINED.